2BTV4-RFB232SBINTNDSerial to Bluetooth SPP/BLE Converter, internal antenna,No DIN

Bluetooth RS-232 adapter user manual V1.0 2025.11.14 1 Bluetooth RS-232 Serial Adapter Model: RF-B-232-SB-INT-ND 1. Package content: Bluetooth RS-232 adapter White Box Dimension: 11 x 6 x 5 (cm) Total Package Weight: 95 g Package Contents:  Dual BLE RS-232 adapter x 1  A4 User manual x 1  Mini USB Cable x 1 2. Profile: 2.1 Top view: LED Status Description Red LED solid on Power On Blue LED solid on Bluetooth Link Blue LED flash Bluetooth not Link Both LED off DFU mode DB9 (Female) Mini USB (Power) ▲ ▲▲ ▲ + (5~36 VDC) ▼ GND Reset to Default LED: Link: Blue PWR/Data: Red Radio Frequency area: Don’t cover any metal material or painting. (Internal antenna type) Bluetooth RS-232 adapter user manual V1.0 2025.11.14 2 2.2 Rear Side: 3. Power supply: 3.1 Voltage: 5~36 VDC, Don’t exceed the limit. 3.2 There’re 3 ways to power the adapter: Mini USB, 2P Terminal Block (Blue) and pin9 of DB9, please choose one. Don’t power the adapter by more than one source. 3.3 The mini USB to type A cable is inside the standard package and for power input only. 4. Guide: 4.1 Default value:  Baud rate: 9,600 bps  Data bit: 8  Parity: none  Stop bit: 1  Flow control: none  Device Name: Serial Adapter  Mode: Default is “Slave” or “Peripheral” 4.2 If the PC not built in the Bluetooth, please source the Bluetooth USB dongle or use the same adapter set as the “master”. The built in Bluetooth of NB supports class 2 only, 10 meters. If you need 100 meters range, you will connect two same adapters. 4.3 Slide Switch of “DTE/DCE” Use the slide switch to swap the “TX/RX” and “CTS/RTS”. By slide the switch, you can set the adaptor either as a DTE (towards antenna connector) or a DCE (towards DB9 connector). In most situation, switch to “DTE” if connect with the remote device. 4.4 Slave mode (default): Start the searching from the PC or smartphone and connect it. 4.5 Master mode: , The adapter can be configured the “Master” or “Central” by the command “role=m” or “role=c”. The master will be set the command “search=y” to find the Bluetooth slave devices and connect the list no. after searching in the terminal software, please check the “connect=no.” command. 4.6 Reset Button: Pressed with a clip or pin into the hole on the top cover. Restore the factory settings by pressing the button over three seconds. ▲ DCE ▼ DTE Bluetooth RS-232 adapter user manual V1.0 2025.11.14 3 5. Setup Command set (any capital or lowercase combination is available) Command Value Description ? List all the command set ADDRESS=? This command is used to display the Bluetooth address of the local adaptor. AT Check the connection status between control terminal and the RS-232 adapter. Response: “OK” when the connection is ok. Response: “ERROR” when the connection is not ok. AUTO= This command is used to enable/disable auto-connection feature. It is available only when the adaptor is in the master role. All the slaves with the same pin code will be connected. Y The Master role adapter will connect the latest paired Bluetooth device automatically. (Default) N The user will connect the Bluetooth device manually. ? Inquire the current setting. BAUD= This command is used to specify the baud rate of COM port. The command will need 200 ms delay. 1200 1200 bps 2400 2400 bps 4800 4800 bps (Default) 9600 9600 bps 19200 19200 bps 38400 38400 bps 57600 57600 bps 115200 115200 bps 230400 230400 bps ? Inquire the current baud rate. BIT= Data bit 5 5 data bits 6 6 data bits 7 7 data bits (Default) 8 8 data bits ? Inquire the data bit setting. CONNECT= This command is used to establish a connection manually. It is available only when the adaptor is in the master role. Used for SPP mode. 1~8 Connect the adaptor to a Bluetooth device in the neighborhood found through “SEARCH=?” xxxxxxxxxxxx Connect the remote adapter by type the MAC address directly without searching. ? Display the MAC address of the latest paired device. DEFAULT=Y This command is used to restore the default settings and originate a warm start. DFU= Y Switch to the firmware upgrade procedure, please disconnect the COM port when the adapter reply “OK”. Send the firmware file by the “Accessport” software, please check the link on page 6 section 9.3. ECHO= This command is used to specify whether the adaptor echoes characters received from the UART back to the DTE/DCE. Bluetooth RS-232 adapter user manual V1.0 2025.11.14 4 N Command characters received from the UART are not echoed back to the DTE/DCE. (Default) Y Command characters received from the UART are echoed back to the DTE/DCE. ? Inquire the current setting. FLOW= This command enable or disable flow control signals (CTS/RTS) of the UART port. Note, the setting is not affected by DEFAULT. The command will need 1 second delay. (Default) N Disable flow control. Y Enable flow control. ? Inquire the current setting KEY= The key value will be created by the smart phone or Win10 devices when pairing with the slave adapter. Please type the same 6 numbers shown on the smart phone or Win10 devices within 15 seconds. (Default) N Y ? MAC= The mac. Address will be customized by the user. The master will connect the 2 nd slave with the same mac. address if the 1 st slave damaged. xxxxxxxxxxxx The head of the address 0012, 0018, 0019 is available only. ? NAME= This command is used to specify a name for the adaptor. You can specify a friendly name using 0 to 9, A to Z, a to z, space and –, which are all valid characters. Note that “first space or -, last space or – isn’t permitted”. The default name is “Serial Adaptor”. (Default) Serial Adapter Default device name xx....xx “xx....xx” is a character string with the length from 2 to 30. R Restore the default settings name=“Serial Adapter”. ? Inquire the name of the local adaptor. ONE= The master will link with one paired or any nearby slave automatically. All the slaves with the same pin code will be connected. Once connected, the master will not change the paired slave until reset to default from the slave. T…

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Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn RF Exposure MPE Report Reference No. ..................... : FCC ID............................................. : CTA25112802404 2BTV4-RFB232SBINTND Compiled by ( position+printed name+signature) . : File administrators Zoey Cao Supervised by ( position+printed name+signature) . : Project Engineer Ace Chai Approved by ( position+printed name+signature) . : RF Manager Eric Wang Date of issue .................................... : Dec. 20, 2025 Testing Laboratory Name .............. : Shenzhen CTA Testing Technology Co., Ltd. Address............................................ : Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Applicant’s name ............................ : Jeddy Ventures Limited Liability Company Address............................................ : 2400 Belmar Blvd.STE B-15, Wall Township NJ 07719 Standard ........................................... : 47CFR §1.1310 47CFR §2.1091 KDB447498 D01 General RF Exposure Guidance v06 Shenzhen CTA Testing Technology Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purpses as long as the Shenzhen CTA Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTA Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description ..................... : Serial to Bluetooth SPP/BLE Converter, internal antenna,No DIN Trade Mark ....................................... : SerialComm Manufacturer .................................... : SerialComm Model/Type reference ...................... : RF-B-232-SB-INT-ND Listed Models ................................... : Refer to page 2 Ratings ............................................. : Input: 5V1A Result ............................................... : PASS Report No.: CTA25112802404 Page 2 of 10 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn T E S T R E P O R T Equipment under Test : Serial to Bluetooth SPP/BLE Converter, internal antenna,No DIN Model /Type : RF-B-232-SB-INT-ND Listed Models : RF-B-232-SB-INT-NDB, RF-B-232-SB-EXT-D, RF-B-485-SB-INT-ND, RF-B-485-SB-EXT-D, RF-W-232-4-INT-ND, RF-W-232-4-INT-NDB, RF-W-232-4-EXT-D, RF-W-485-4-INT-ND, RF-W-485-4-EXT-D, RF-W-232-H-EXT-D, RF-W-485-H-EXT-D, RF-R-232-2-EXT-D, RF-R-232-4-EXT-D, RF-R-485-2-EXT-D, RF-R-485-4-EXT-D, RF-R-254-2-EXT-D, RF-R-254-4-EXT-D, RF-R-232-Z-EXT-D, RF-R-485-Z-EXT-D, RF-R-232-L-EXT-D, RF-R-485-L-EXT-D, RF-R-232-N-EXT-D, RF-R-485-N-EXT-D Model difference : The PCB board, circuit, structure and internal of these models are the same, Only model number and colour is different for these model. Applicant : Jeddy Ventures Limited Liability Company Address : 2400 Belmar Blvd.STE B-15, Wall Township NJ 07719 Manufacturer : SerialComm Address : 2400 Belmar Blvd.STE B-15, Wall Township NJ 07719 Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: CTA25112802404 Page 3 of 10 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Contents 1 TEST STANDARDS ............................................................................................................ 4 2 SUMMARY .......................................................................................................................... 5 2.1 General Remarks ..................................................................................................... 5 2.2 Product Description ................................................................................................. 5 2.3 Special Accessories ................................................................................................. 6 2.4 Modifications ............................................................................................................ 6 3 TEST ENVIRONMENT ....................................................................................................... 7 3.1 Address of the test laboratory .................................................................................. 7 3.2 Test Facility .............................................................................................................. 7 3.3 Statement of the measurement uncertainty ............................................................. 7 4 Test limit .............................................................................................................................. 8 4.1 Requirement ............................................................................................................ 8 4.2 MPE Calculation Method ......................................................................................... 8 4.3 Conducted Power Results ....................................................................................... 8 4.4 Manufacturing tolerance .......................................................................................... 9 4.5 Standalone MPE Result ................................................…

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FCC ID: 2BTV4-RFB232SBINTND Test Setup Photos of the EUT FCC ID: 2BTV4-RFB232SBINTND

1 FCC Appendix RF Test Data for BLE FCC ID : 2BTV4-RFB232SBINTND Company : Jeddy Ventures Limited Liability Company EUT : Serial to Bluetooth SPP/BLE Converter, internal antenna,No DIN Model Number : RF-B-232-SB-INT-ND Report No. : CTA25112802401 Reviewed By : Eric Wang 2 Appendix A: DTS Bandwidth Test Result TestMode Antenna Freq(MHz) DTS BW [MHz] FL[MHz] FH[MHz] Limit[MHz] Verdict BLE_1M Ant1 2402 0.644 2401.688 2402.332 0.5 PASS 2440 0.652 2439.688 2440.340 0.5 PASS 2480 0.632 2479.696 2480.328 0.5 PASS 3 Test Graphs BLE_1M_Ant1_2402 BLE_1M_Ant1_2440 BLE_1M_Ant1_2480 4 5 Appendix B: Occupied Channel Bandwidth Test Result TestMode Antenna Freq(MHz) OCB [MHz] FL[MHz] FH[MHz] Limit[MHz] Verdict BLE_1M Ant1 2402 1.0017 2401.5212 2402.5229 --- --- 2440 1.0014 2439.5166 2440.5180 --- --- 2480 1.0041 2479.5183 2480.5224 --- --- 6 Test Graphs BLE_1M_Ant1_2402 BLE_1M_Ant1_2440 BLE_1M_Ant1_2480 7 8 Appendix C: Maximum conducted output power Test Result Peak TestMode Antenna Freq(MHz) Conducted Peak Powert[dBm] Conducted Limit[dBm] Verdict BLE_1M Ant1 2402 -3.79 ≤30 PASS 2440 -4.13 ≤30 PASS 2480 -4.03 ≤30 PASS 9 Appendix D: Maximum power spectral density Test Result TestMode Antenna Freq(MHz) Result[dBm/3kHz] Limit[dBm/3kHz] Verdict BLE_1M Ant1 2402 -19.66 ≤8.00 PASS 2440 -19.86 ≤8.00 PASS 2480 -20.00 ≤8.00 PASS 10 Test Graphs BLE_1M_Ant1_2402 BLE_1M_Ant1_2440 BLE_1M_Ant1_2480 11 12 Appendix E: Band edge measurements Test Result TestMod e Antenn a ChNam e Freq(MHz ) RefLevel[dBm ] Result[dBm ] Limit[dBm ] Verdic t BLE_1M Ant1 Low 2402 -3.90 -54.13 ≤-23.9 PASS High 2480 -5.14 -55.64 ≤-25.14 PASS 13 Test Graphs BLE_1M_Ant1_Low_2402 BLE_1M_Ant1_High_2480 14 Appendix F: Conducted Spurious Emission Test Result TestMode Antenna Freq(MHz) FreqRange [MHz] RefLevel [dBm] Result[dBm] Limit[dBm] Verdict BLE_1M Ant1 2402 Reference -3.96 -3.96 --- PASS 30~1000 -3.96 -68.38 ≤-23.96 PASS 1000~26500 -3.96 -44.84 ≤-23.96 PASS 2440 Reference -5.56 -5.56 --- PASS 30~1000 -5.56 -68.31 ≤-25.56 PASS 1000~26500 -5.56 -46.43 ≤-25.56 PASS 2480 Reference -5.48 -5.48 --- PASS 30~1000 -5.48 -67.43 ≤-25.48 PASS 1000~26500 -5.48 -48.35 ≤-25.48 PASS 15 Test Graphs BLE_1M_Ant1_2402_0~Reference BLE_1M_Ant1_2402_30~1000 BLE_1M_Ant1_2402_1000~26500 16 BLE_1M_Ant1_2440_0~Reference BLE_1M_Ant1_2440_30~1000 17 BLE_1M_Ant1_2440_1000~26500 BLE_1M_Ant1_2480_0~Reference BLE_1M_Ant1_2480_30~1000 18 BLE_1M_Ant1_2480_1000~26500 19 Appendix G: Duty Cycle Test Result TestMode Antenna Freq(MHz) ON Time [ms] Period [ms] X DC [%] xFactor Limit Verdict BLE_1M Ant1 2402 0.41 0.63 0.6508 65.08 1.87 --- --- 2440 0.41 0.63 0.6508 65.08 1.87 --- --- 2480 0.41 0.63 0.6508 65.08 1.87 --- --- 20 Test Graphs BLE_1M_Ant1_2402 BLE_1M_Ant1_2440 BLE_1M_Ant1_2480 21

31 11G_Ant1_2412_30~1000 11G_Ant1_2412_1000~26500 11G_Ant1_2437_0~Reference 32 11G_Ant1_2437_30~1000 11G_Ant1_2437_1000~26500 33 11G_Ant1_2462_0~Reference 11G_Ant1_2462_30~1000 11G_Ant1_2462_1000~26500 34 11N20SISO_Ant1_2412_0~Reference 11N20SISO_Ant1_2412_30~1000 35 11N20SISO_Ant1_2412_1000~26500 11N20SISO_Ant1_2437_0~Reference 11N20SISO_Ant1_2437_30~1000 36 11N20SISO_Ant1_2437_1000~26500 11N20SISO_Ant1_2462_0~Reference 37 11N20SISO_Ant1_2462_30~1000 11N20SISO_Ant1_2462_1000~26500 11N40SISO_Ant1_2422_0~Reference 38 11N40SISO_Ant1_2422_30~1000 11N40SISO_Ant1_2422_1000~26500 39 11N40SISO_Ant1_2437_0~Reference 11N40SISO_Ant1_2437_30~1000 11N40SISO_Ant1_2437_1000~26500 40 11N40SISO_Ant1_2452_0~Reference 11N40SISO_Ant1_2452_30~1000 41 11N40SISO_Ant1_2452_1000~26500 42 Appendix G: Duty Cycle Test Result TestMode Antenna Frequency[MHz] Transmission Duration [ms] Transmission Period [ms] Duty Cycle [%] 11B Ant1 2412 8.34 8.38 99.52 2437 8.35 8.40 99.40 2462 8.34 8.38 99.52 11G Ant1 2412 0.15 0.20 75.00 2437 0.15 0.20 75.00 2462 0.15 0.20 75.00 11N20SISO Ant1 2412 0.18 0.23 78.26 2437 0.18 0.23 78.26 2462 0.18 0.23 78.26 11N40SISO Ant1 2422 0.18 0.23 78.26 2437 0.18 0.23 78.26 2452 0.18 0.23 78.26 43 Test Graphs 11B_Ant1_2412 11B_Ant1_2437 11B_Ant1_2462 44 11G_Ant1_2412 11G_Ant1_2437 45 11G_Ant1_2462 11N20SISO_Ant1_2412 11N20SISO_Ant1_2437 46 11N20SISO_Ant1_2462 11N40SISO_Ant1_2422 47 11N40SISO_Ant1_2437 11N40SISO_Ant1_2452

1 FCC Appendix RF Test Data for 2.4GWIFI FCC ID : 2BTV4-RFB232SBINTND Company : Jeddy Ventures Limited Liability Company EUT : Serial to Bluetooth SPP/BLE Converter, internal antenna,No DIN Model Number : RF-B-232-SB-INT-ND Report No. : CTA25112802403 Reviewed By : Eric Wang 2 Appendix A: DTS Bandwidth Test Result TestMode Antenna Frequency[MHz] DTS BW [MHz] FL[MHz] FH[MHz] Limit[MHz] Verdict 11B Ant1 2412 10.240 2406.920 2417.160 0.5 PASS 2437 10.240 2431.920 2442.160 0.5 PASS 2462 10.240 2456.920 2467.160 0.5 PASS 11G Ant1 2412 15.680 2404.440 2420.120 0.5 PASS 2437 16.040 2429.000 2445.040 0.5 PASS 2462 15.600 2454.120 2469.720 0.5 PASS 11N20SISO Ant1 2412 17.320 2403.400 2420.720 0.5 PASS 2437 17.160 2428.520 2445.680 0.5 PASS 2462 17.360 2453.280 2470.640 0.5 PASS 11N40SISO Ant1 2422 35.600 2404.240 2439.840 0.5 PASS 2437 35.680 2419.240 2454.920 0.5 PASS 2452 35.680 2434.240 2469.920 0.5 PASS 3 Test Graphs 11B_Ant1_2412 11B_Ant1_2437 11B_Ant1_2462 4 11G_Ant1_2412 11G_Ant1_2437 5 11G_Ant1_2462 11N20SISO_Ant1_2412 11N20SISO_Ant1_2437 6 11N20SISO_Ant1_2462 11N40SISO_Ant1_2422 7 11N40SISO_Ant1_2437 11N40SISO_Ant1_2452 8 Appendix B: Occupied Channel Bandwidth Test Result TestMode Antenna Channel Frequency[MHz] OCB [MHz] FL[MHz] FH[MHz] Limit[MHz] Verdict 11B Ant1 2412 13.375 2405.3551 2418.7301 --- --- 2437 13.376 2430.3417 2443.7177 --- --- 2462 13.390 2455.3188 2468.7088 --- --- 11G Ant1 2412 16.717 2403.7307 2420.4477 --- --- 2437 16.705 2428.6858 2445.3908 --- --- 2462 16.754 2453.6690 2470.4230 --- --- 11N20SISO Ant1 2412 17.811 2403.1449 2420.9559 --- --- 2437 17.807 2428.1113 2445.9183 --- --- 2462 17.858 2453.0834 2470.9414 --- --- 11N40SISO Ant1 2422 35.959 2404.1029 2440.0619 --- --- 2437 36.033 2419.0692 2455.1022 --- --- 2452 36.045 2434.0590 2470.1040 --- --- 9 Test Graphs 11B_Ant1_2412 11B_Ant1_2437 11B_Ant1_2462 10 11G_Ant1_2412 11G_Ant1_2437 11 11G_Ant1_2462 11N20SISO_Ant1_2412 11N20SISO_Ant1_2437 12 11N20SISO_Ant1_2462 11N40SISO_Ant1_2422 13 11N40SISO_Ant1_2437 11N40SISO_Ant1_2452 14 Appendix C: Maximum conducted output power Test Result Peak Test Mode Antenna Frequency[MHz] Peak power [dBm] Limit [dBm] Verdict 11B Ant1 2412 14.76 ≤30.00 PASS 2437 14.86 ≤30.00 PASS 2462 14.99 ≤30.00 PASS 11G Ant1 2412 13.10 ≤30.00 PASS 2437 13.35 ≤30.00 PASS 2462 13.48 ≤30.00 PASS 11N20SISO Ant1 2412 13.17 ≤30.00 PASS 2437 13.17 ≤30.00 PASS 2462 13.44 ≤30.00 PASS 11N40SISO Ant1 2422 13.44 ≤30.00 PASS 2437 13.70 ≤30.00 PASS 2452 13.63 ≤30.00 PASS 15 Appendix D: Maximum power spectral density Test Result TestMode Antenna Frequency[MHz] Result[dBm/3-100kHz] Limit[dBm/3kHz] Verdict 11B Ant1 2412 -11.36 ≤8.00 PASS 2437 -11.28 ≤8.00 PASS 2462 -10.99 ≤8.00 PASS 11G Ant1 2412 -17.43 ≤8.00 PASS 2437 -17.14 ≤8.00 PASS 2462 -17.46 ≤8.00 PASS 11N20SISO Ant1 2412 -15.68 ≤8.00 PASS 2437 -16.65 ≤8.00 PASS 2462 -17.22 ≤8.00 PASS 11N40SISO Ant1 2422 -20.25 ≤8.00 PASS 2437 -18.78 ≤8.00 PASS 2452 -19.52 ≤8.00 PASS 16 Test Graphs 11B_Ant1_2412 11B_Ant1_2437 11B_Ant1_2462 17 11G_Ant1_2412 11G_Ant1_2437 18 11G_Ant1_2462 11N20SISO_Ant1_2412 11N20SISO_Ant1_2437 19 11N20SISO_Ant1_2462 11N40SISO_Ant1_2422 20 11N40SISO_Ant1_2437 11N40SISO_Ant1_2452 21 Appendix E: Band edge measurements Test Result TestMode Antenn a ChNam e Frequency[MH z] RefLevel[dB m] Result[dB m] Limit[dBm ] Verdic t 11B Ant1 Low 2412 2.42 -46.97 ≤-17.58 PASS High 2462 2.94 -53.56 ≤-17.06 PASS 11G Ant1 Low 2412 -2.71 -35.14 ≤-22.71 PASS High 2462 -2.41 -58.06 ≤-22.41 PASS 11N20SIS O Ant1 Low 2412 -2.41 -33.4 ≤-22.41 PASS High 2462 -2.08 -57.63 ≤-22.08 PASS 11N40SIS O Ant1 Low 2422 -5.64 -34.28 ≤-25.64 PASS High 2452 -5.38 -57.47 ≤-25.38 PASS 22 Test Graphs 11B_Ant1_Low_2412 11B_Ant1_High_2462 11G_Ant1_Low_2412 23 11G_Ant1_High_2462 11N20SISO_Ant1_Low_2412 24 11N20SISO_Ant1_High_2462 11N40SISO_Ant1_Low_2422 11N40SISO_Ant1_High_2452 25 26 Appendix F: Conducted Spurious Emission Test Result TestMode Antenna Frequency[MHz] FreqRange [Mhz] RefLevel [dBm] Result [dBm] Limit [dBm] Verdict 11B Ant1 2412 Reference 0.96 0.96 --- PASS 30~1000 0.96 -68.25 ≤-19.04 PASS 1000~26500 0.96 -54.51 ≤-19.04 PASS 2437 Reference 1.75 1.75 --- PASS 30~1000 1.75 -67.79 ≤-18.25 PASS 1000~26500 1.75 -54.3 ≤-18.25 PASS 2462 Reference 2.59 2.59 --- PASS 30~1000 2.59 -66.25 ≤-17.41 PASS 1000~26500 2.59 -54.89 ≤-17.41 PASS 11G Ant1 2412 Reference -3.32 -3.32 --- PASS 30~1000 -3.32 -67.44 ≤-23.32 PASS 1000~26500 -3.32 -54.96 ≤-23.32 PASS 2437 Reference -2.23 -2.23 --- PASS 30~1000 -2.23 -68.39 ≤-22.23 PASS 1000~26500 -2.23 -53.85 ≤-22.23 PASS 2462 Reference -2.18 -2.18 --- PASS 30~1000 -2.18 -67.43 ≤-22.18 PASS 1000~26500 -2.18 -55.19 ≤-22.18 PASS 11N20SISO Ant1 2412 Reference -3.21 -3.21 --- PASS 30~1000 -3.21 -68.39 ≤-23.21 PASS 1000~26500 -3.21 -55.21 ≤-23.21 PASS 2437 Reference -2.65 -2.65 --- PASS 30~1000 -2.65 -68.67 ≤-22.65 PASS 1000~26500 -2.65 -55.21 ≤-22.65 PASS 2462 Reference -3.52 -3.52 --- PASS 30~1000 -3.52 -68.02 ≤-23.52 PASS 1000~26500 -3.52 -54.92 ≤-23.52 PASS 11N40SISO Ant1 2422 Reference -5.91 -5.91 --- PASS 30~1000 -5.91 -67.71 ≤-25.91 PASS 1000~26500 -5.91 -54.69 ≤-25.91 PASS 2437 Reference -5.79 -5.79 --- PASS 30~1000 -5.79 -68.3 ≤-25.79 PASS 1000~26500 -5.79 -55.14 ≤-25.79 PASS 2452 Reference -5.70 -5.70 --- PASS 30~1000 -5.70 -68.58 ≤-25.7 PASS 1000~26500 -5.70 -55.67 ≤-25.7 PASS 27 Test Graphs 11B_Ant1_2412_0~Reference 11B_Ant1_2412_30~1000 11B_Ant1_2412_1000~26500 28 11B_Ant1_2437_0~Reference 11B_Ant1_2437_30~1000 29 11B_Ant1_2437_1000~26500 11B_Ant1_2462_0~Reference 11B_Ant1_2462_30~1000 30 11B_Ant1_2462_1000~26500 11G_Ant1_2412_0~Reference

Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn FCC PART 15 SUBPART C TEST REPORT FCC PART 15.247 Report Reference No. .................... : FCC ID. .......................................... : CTA25112802403 2BTV4-RFB232SBINTND Compiled by ( position+printed name+signature) . : File administrators Zoey Cao Supervised by ( position+printed name+signature) . : Project Engineer Ace Chai Approved by ( position+printed name+signature) . : RF Manager Eric Wang Date of issue .................................... : Dec. 20, 2025 Testing Laboratory Name ............. : Shenzhen CTA Testing Technology Co., Ltd. Address ............................................ : Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Applicant’s name ........................... : Jeddy Ventures Limited Liability Company Address ............................................ : 2400 Belmar Blvd.STE B-15, Wall Township NJ 07719 Test specification.......................... : Standard .......................................... : FCC Part 15.247 TRF Originator ................................. : Shenzhen CTA Testing Technology Co., Ltd. Shenzhen CTA Testing Technology Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen CTA Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTA Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description .................... : Serial to Bluetooth SPP/BLE Converter, internal antenna,No DIN Trade Mark ....................................... : SerialComm Manufacturer .................................... : SerialComm Model/Type reference ...................... : RF-B-232-SB-INT-ND Listed Models ................................... : Refer to page 2 Modulation Type .............................. : CCK/DSSS/OFDM Operation Frequency ....................... : From 2412 - 2462MHz Ratings ............................................. : Input: 5V1A Result ............................................... : PASS Report No.: CTA25112802403 Page 2 of 28 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn T E S T R E P O R T Equipment under Test : Serial to Bluetooth SPP/BLE Converter, internal antenna,No DIN Model /Type : RF-B-232-SB-INT-ND Listed Models : RF-B-232-SB-INT-NDB, RF-B-232-SB-EXT-D, RF-B-485-SB-INT-ND, RF-B-485-SB-EXT-D, RF-W-232-4-INT-ND, RF-W-232-4-INT-NDB, RF-W-232-4-EXT-D, RF-W-485-4-INT-ND, RF-W-485-4-EXT-D, RF-W-232-H-EXT-D, RF-W-485-H-EXT-D, RF-R-232-2-EXT-D, RF-R-232-4-EXT-D, RF-R-485-2-EXT-D, RF-R-485-4-EXT-D, RF-R-254-2-EXT-D, RF-R-254-4-EXT-D, RF-R-232-Z-EXT-D, RF-R-485-Z-EXT-D, RF-R-232-L-EXT-D, RF-R-485-L-EXT-D, RF-R-232-N-EXT-D, RF-R-485-N-EXT-D Model difference : The PCB board, circuit, structure and internal of these models are the same, Only model number and colour is different for these model. Applicant : Jeddy Ventures Limited Liability Company Address : 2400 Belmar Blvd.STE B-15, Wall Township NJ 07719 Manufacturer : SerialComm Address : 2400 Belmar Blvd.STE B-15, Wall Township NJ 07719 Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: CTA25112802403 Page 3 of 28 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Contents 1 TEST STANDARDS ...................................................................................................................................... 4 2 SUMMARY .................................................................................................................................................... 5 2.1 General Remarks .............................................................................................................................. 5 2.2 Product Description ........................................................................................................................... 5 2.3 Equipment Under Test ....................................................................................................................... 5 2.4 Short description of the Equipment under Test (EUT) ...................................................................... 5 2.5 EUT configuration .............................................................................................................................. 6 2.6 EUT operation mode ......................................................................................................................... 6 2.7 Block Diagram of Test Setup ............................................................................................................. 6 2.8 Related Submittal(s) / Grant (s) ......................................................................................................... 6 2.9 Modifications ...................................................................................................................................... 6 3 TEST ENVIRONMENT ..........................................................…

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Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn FCC PART 15 SUBPART C TEST REPORT FCC PART 15.247 Report Reference No. ...................: FCC ID. ......................................... : CTA25112802401 2BTV4-RFB232SBINTND Compiled by ( position+printed name+signature) : File administrators Zoey Cao Supervised by ( position+printed name+signature) : Project Engineer Ace Chai Approved by ( position+printed name+signature) : RF Manager Eric Wang Date of issue ...................................: Dec. 20, 2025 Testing Laboratory Name .............: Shenzhen CTA Testing Technology Co., Ltd. Address ..........................................: Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Applicant’s name...........................: Jeddy Ventures Limited Liability Company Address ...........................................: 2400 Belmar Blvd.STE B-15, Wall Township NJ 07719 Test specification ......................... : Standard ..........................................: FCC Part 15.247 Shenzhen CTA Testing Technology Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen CTA Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTA Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Equipment description ................ : Serial to Bluetooth SPP/BLE Converter, internal antenna,No DIN Trade Mark ......................................: SerialComm Manufacturer ...................................: SerialComm Model/Type reference ...............…

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