2ABFFBTC21Bluetooth Transmitter and Receiver

BTC21 Bluetooth Transmitter and Receiver Product Diagram 1. Multi-function Button 2. LED Indicator 3. 3.5mm Audio Port 4. Optical Audio Port 5. Coaxial Audio Port 6. Micro USB Charging Port LED Indicator Status Flashing Red and Blue Pairing mode Solid Blue LED Successfully paired How to Use Attach the antenna Screw the package included antenna on to the rear of the BTC21R antenna terminal by firmly turning it to the right. Set up the antenna and set it to the desired position. Note: Different antenna positions can affect wireless working range. Check which position gives you the best result. Connect the AC adapter (DC 5V) Plug the AC adapter into the wall socket. Connect the other end of the USB cable to the rear side of the BTC21R. Setting Up Your Bluetooth Music Receiver Connect the Bluetooth Music Receiver to an audio input on your home music system. You can either connect with a standard connection or use one with a higher definition. • Standard options i. RCA-style Right/Left connections ii. Direct connect from 3.5mm to an auxiliary input (a 3.5mm Audio cable is included) • HD options i. Coaxial cable (included); ii. Optical cable (not included) Please consult your home music system’s manual for more information on which connections make sense with your system. Important notice: Take out the 3.5mm Audio cable from 3.5mm Audio Port of this BTC21R receiver when you choose these HD options. Turning the BTC21R Receiver On/Off Turn on Press and hold the multi-function button for 3 seconds, the Blue LED indicator will stay on for 1 seconds. Turn off Press and hold the multi-function button for 2 seconds, the Red LED indicator will stay on for 1 seconds. Note: • The BTC21R adapter will automatically turn off if no connection within 5 minutes. Pairing 1. Connect your BTC21R Receiver to your non-Bluetooth audio receiving device. 2. When powered off, press and hold the multifunction button for 6 seconds until the red and blue LED light flashes alternately, then this BTC21R Receiver is in the pairing mode and ready for connection. 3. Activate the Bluetooth function on your transmitting device –phone / tablet, and search for the nearby Bluetooth devices: • For iOS: Settings > Bluetooth > On • For Android: Settings > Bluetooth > On > Scan for devices 4. Find “BTC21R” in the search results and tap on it to connect. Once connected, the LED indicator will turn solid blue. 5. If a code or pin is required for pairing, please enter “0000”. Note: • The adapter can remember previously paired devices and will attempt to pair with devices automatically, without going into pairing mode. • The BTC21R adapter will be automatically out of pairing mode in 5 minutes and turn off if no connection within 5 minutes. Troubleshooting My BTC21R Receiver will not power on. Check the power connection and make sure you pressed the multifunction button for at least 3 seconds. Wireless working range to low Make sure you attached the antenna correctly and no obstacles between the BTC21R and your connected devices. Changing Connected Bluetooth Device If you want to switch from one device to another, follow these steps: • End the existing Bluetooth connection with the connected device by either disconnecting within your “settings” or turning off Bluetooth. • The HD Bluetooth Music Receiver can now be connected to a different smart mobile device. • Follow the instruction in "Pairing" to connect a different device. My music is not coming out of the stereo speakers. • Make sure the BTC21R is powered on. • Make sure an audio cable is correctly and firmly connected to the BTC21R and no other audio cable plugged in the BTC21R another input jack. • Make sure that your audio system is powered on and turned to the proper input. • Make sure the stereo volume is set to a comfortable listening level. • Make sure you are within range of the receiver, and that your smart device is connected via Bluetooth with this receiver. • Make sure your audio device is playing music via Bluetooth. Some devices (such as computer) require manually selecting the music output mode. I am having trouble pairing and connecting to my Bluetooth device. Please check the following: • Your Bluetooth device supports the Bluetooth profiles listed in the specifications. • This Receiver and your device are next to each other or within 3 feet / 1 meter. • This Receiver is in pairing mode; this is indicated by the LED flashing in red and blue alternately. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: - Reorient or relocate the receiving antenna. - Increase the separation between the equipment and receiver. -Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. -Consult the dealer or an experienced radio/TV technician for help Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This device contains licence-exempt transmitter…

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External Photos Main test model BTC21 and Series Model--BTC21A TOP VIEW OF EUT Note: Bluetooth antenna is fixed by glue. BOTTOM VIEW OF EUT Antenna FRONT VIEW OF EUT BACK VIEW OF EUT LEFT VIEW OF EUT RIGHT VIEW OF EUT VIEW OF EUT (PORT)-1 VIEW OF EUT (PORT)-2 Series Model--BTC21B, BTC21C, BTC21D, BTC21E, BTC21F, BTC21G TOP VIEW OF EUT BOTTOM VIEW OF EUT Antenna FRONT VIEW OF EUT BACK VIEW OF EUT LEFT VIEW OF EUT RIGHT VIEW OF EUT VIEW OF EUT (PORT)-1 VIEW OF EUT (PORT)-2

FCC ID and IC Label Location 15mm*15mm FCC ID: 2ABFFBTC21 IC: 26361-BTC21 HVIN: BTC21 15mm*15mm FCC ID: 2ABFFBTC21 IC: 26361-BTC21 HVIN: BTC21A 15mm*15mm FCC ID: 2ABFFBTC21 IC: 26361-BTC21 HVIN: BTC21B 15mm*15mm FCC ID: 2ABFFBTC21 IC: 26361-BTC21 HVIN: BTC21C 15mm*15mm FCC ID: 2ABFFBTC21 IC: 26361-BTC21 HVIN: BTC21D 15mm*15mm FCC ID: 2ABFFBTC21 IC: 26361-BTC21 HVIN: BTC21E 15mm*15mm FCC ID: 2ABFFBTC21 IC: 26361-BTC21 HVIN: BTC21F 15mm*15mm FCC ID: 2ABFFBTC21 IC: 26361-BTC21 HVIN: BTC21G

Internal Photos Main test model BTC21 and Series Model--BTC21A OPEN VIEW OF EUT INTERNAL VIEW OF EUT-1 INTERNAL VIEW OF EUT-2 INTERNAL VIEW OF EUT-3 INTERNAL VIEW OF EUT-4 INTERNAL VIEW OF EUT-5 Series Model--BTC21B, BTC21C, BTC21D, BTC21E, BTC21F, BTC21G OPEN VIEW OF EUT INTERNAL VIEW OF EUT-1 INTERNAL VIEW OF EUT-2 INTERNAL VIEW OF EUT-3 . INTERNAL VIEW OF EUT-4 INTERNAL VIEW OF EUT-5

SHENZHEN SURE THING INDUSTRY AND COMMERCE DEVELOPMENT CO.,LTD 2-3F,Building A,Fuxinlin Industrial Park, Hangcheng Industrial Area,Xixiang Town,Bao An, Shenzhen, China Declaration concerning Antenna Specification It is hereby declared that the product Model No.: BTC21, BTC21A, BTC21B, BTC21C, BTC21D, BTC21E, BTC21F, BTC21G FCC ID: 2ABFFBTC21 fulfills the requirement in FCC test relating to the antenna type. The device specified above confirms to the FCC recommendations for internal antenna type described below: BT ANTENNA Model No. of antenna: N/A Type of antenna: ROD Antenna (Comply with requirements of the FCC part 15.203) Gain of the antenna: 2 dBi Frequency range: 2402-2480 MHz The mounting of the antenna is fixed to the radio module and no other antenna should be used. Company name: SHENZHEN SURE THING INDUSTRY AND COMMERCE DEVELOPMENT CO.,LTD Address: 2-3F,Building A,Fuxinlin Industrial Park, Hangcheng Industrial Area,Xixiang Town,Bao An, Shenzhen, China City: Shenzhen ZIP / Postal code: Country: China Place: Shenzhen Date: Sep. 15, 2020 Signature:

RF EXPOSURE EVALUATION 1. PRODUCT INFORMATION Product Description Bluetooth Transmitter and Receiver Model Name BTC21 FCC ID 2ABFFBTC21 2. EVALUATION METHOD According to 447498 D01 General RF Exposure Guidance v05 The 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ·[√f(GHz)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. Where f(GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation 3. CALCULATION BR/EDR: P t = 4.067dBm=2.55mW The value of the Maximum output power P t is referred to the test report of the CFR47 §15.247. The result for RF exposure evaluation SAR=(2.55mW /5mm) .[√2.441GHz)]=0.80<3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. 4. CONCLUSION The SAR evaluation is not required.

Page 1 of 78 FCC Test Report Report No.: AGC00194200802FE03 FCC ID : 2ABFFBTC21 APPLICATION PURPOSE : Original Equipment PRODUCT DESIGNATION : Bluetooth Transmitter and Receiver BRAND NAME : N/A MODEL NAME : BTC21, BTC21A, BTC21B, BTC21C, BTC21D, BTC21E, BTC21F, BTC21G APPLICANT : SHENZHEN SURE THING INDUSTRY AND COMMERCE DEVELOPMENT CO., LTD DATE OF ISSUE : Aug. 31, 2020 STANDARD(S) : FCC Part 15.247 REPORT VERSION : V1.0 Attestation of Global Compliance (Shenzhen) Co., Ltd Report No.: AGC00194200802FE03 Page 2 of 78 REPORT REVISE RECORD Report Version Revise Time Issued Date Valid Version Notes V1.0 / Aug. 31, 2020 Valid Initial Release Report No.: AGC00194200802FE03 Page 3 of 78 TABLE OF CONTENTS 1. VERIFICATION OF CONFORMITY .................................................................................................................. 5 2. GENERAL INFORMATION .............................................................................................................................. 6 2.1. PRODUCT DESCRIPTION ........................................................................................................................ 6 2.2. TABLE OF CARRIER FREQUENCYS ....................................................................................................... 6 2.3. RECEIVER INPUT BANDWIDTH .............................................................................................................. 7 2.4. EXAMPLE OF A HOPPING SEQUENCY IN DATA MODE ......................................................................... 7 2.5. EQUALLY AVERAGE USE OF FREQUENCIES AND BEHAVIOUR ......................................................... 7 2.6. RELATED SUBMITTAL(S) / GRANT (S) .................................................................................................... 8 2.7. TEST METHODOLOGY ............................................................................................................................. 8 2.8. SPECIAL ACCESSORIES ......................................................................................................................... 8 2.9. EQUIPMENT MODIFICATIONS ................................................................................................................. 8 2.10. ANTENNA REQUIREMENT..................................................................................................................... 8 3. MEASUREMENT UNCERTAINTY ................................................................................................................... 9 4. DESCRIPTION OF TEST MODES ................................................................................................................. 10 5. SYSTEM TEST CONFIGURATION ................................................................................................................ 11 5.1. CONFIGURATION OF EUT SYSTEM ...................................................................................................... 11 5.2. EQUIPMENT USED IN TESTED SYSTEM .............................................................................................. 11 5.3. SUMMARY OF TEST RESULTS .............................................................................................................. 11 6. TEST FACILITY .............................................................................................................................................. 12 7. PEAK OUTPUT POWER ................................................................................................................................ 13 7.1. MEASUREMENT PROCEDURE ............................................................................................................. 13 7.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................... 13 7.3. LIMITS AND MEASUREMENT RESULT .................................................................................................. 14 8. 20DB BANDWIDTH ........................................................................................................................................ 20 8.1. MEASUREMENT PROCEDURE ............................................................................................................. 20 8.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................... 20 8.3. LIMITS AND MEASUREMENT RESULTS ............................................................................................... 21 9. CONDUCTED SPURIOUS EMISSION........................................................................................................... 27 9.1. MEASUREMENT PROCEDURE ............................................................................................................. 27 Report No.: AGC00194200802FE03 Page 4 of 78 9.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................... 27 9.3. MEASUREMENT EQUIPMENT USED .................................................................................................... 27 9.4. LIMITS AND MEASUREMENT RESULT .................................................................................................. 27 10. RADIATED EMISSION ................................................................................................................................. 40 10.1. MEASUREMENT PROCEDURE ........................................................................................................... 40 10.2. TEST SETUP ......................................................................................................................................... 42 10.3. LIMITS AND MEASUREMENT RESULT ............................................................................................... 43 10.4. TEST RESULT........................................................................................................................................ 43 11. NUM…

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Report No.: AGC00194200802FE03 Page 61 of 78 14.5. TEST RESULT OF LINE CONDUCTED EMISSION TEST Line Conducted Emission Test Line 1-L Report No.: AGC00194200802FE03 Page 62 of 78 Line Conducted Emission Test Line 2-N RESULT: PASS Report No.: AGC00194200802FE03 Page 63 of 78 APPENDIX A: PHOTOGRAPHS OF TEST SETUP RADIATED EMISSION TEST SETUP BELOW 1GHz RADIATED EMISSION TEST SETUP ABOVE 1GHz Report No.: AGC00194200802FE03 Page 64 of 78 LINE CONDUCTED EMISSION TEST SETUP CONDUCTED EMISSION TEST SETUP Report No.: AGC00194200802FE03 Page 65 of 78 APPENDIX B: PHOTOGRAPHS OF EUT Main test model BTC21 and Series Model--BTC21A TOP VIEW OF EUT Note: Bluetooth antenna is fixed by glue. BOTTOM VIEW OF EUT Antenna Report No.: AGC00194200802FE03 Page 66 of 78 FRONT VIEW OF EUT BACK VIEW OF EUT Report No.: AGC00194200802FE03 Page 67 of 78 LEFT VIEW OF EUT RIGHT VIEW OF EUT Report No.: AGC00194200802FE03 Page 68 of 78 VIEW OF EUT (PORT)-1 VIEW OF EUT (PORT)-2 Report No.: AGC00194200802FE03 Page 69 of 78 OPEN VIEW OF EUT INTERNAL VIEW OF EUT-1 Report No.: AGC00194200802FE03 Page 70 of 78 INTERNAL VIEW OF EUT-2 INTERNAL VIEW OF EUT-3 Report No.: AGC00194200802FE03 Page 71 of 78 INTERNAL VIEW OF EUT-4 INTERNAL VIEW OF EUT-5 Report No.: AGC00194200802FE03 Page 72 of 78 Series Model--BTC21B, BTC21C, BTC21D, BTC21E, BTC21F, BTC21G TOP VIEW OF EUT BOTTOM VIEW OF EUT Antenna Report No.: AGC00194200802FE03 Page 73 of 78 FRONT VIEW OF EUT BACK VIEW OF EUT Report No.: AGC00194200802FE03 Page 74 of 78 LEFT VIEW OF EUT RIGHT VIEW OF EUT Report No.: AGC00194200802FE03 Page 75 of 78 VIEW OF EUT (PORT)-1 VIEW OF EUT (PORT)-2 Report No.: AGC00194200802FE03 Page 76 of 78 OPEN VIEW OF EUT INTERNAL VIEW OF EUT-1 Report No.: AGC00194200802FE03 Page 77 of 78 INTERNAL VIEW OF EUT-2 INTERNAL VIEW OF EUT-3 . Report No.: AGC00194200802FE03 Page 78 of 78 INTERNAL VIEW OF EUT-4 INTERNAL VIEW OF EUT-5 ----END OF REPORT---- Conditions of Issuance of Test Reports 1. All samples and goods are accepted by the Attestation of Global Compliance (Shenzhen) Co., Ltd (the “Company”) solely for testing and reporting in accordance with the following terms and conditions. The company provides its services on the basis that such terms and conditions constitute express agreement between the company and any person, firm or company requesting its services (the “Clients”). 2. Any report issued by Company as a result of this application for testing services (the “Report”) shall be issued in confidence to the Clients and the Report will be strictly treated as such by the Company. It may not be reproduced either in its entirety or in part and it may not be used for advertising or other unauthorized purposes without the written consent of the Company. The Clients to whom the Report is issued may, however, show or send it, or a certified copy thereof prepared by the Company to its customer, supplier or other persons directly concerned. The Company will not, without the consent of the Clients, enter into any discussion or correspondence with any third party concerning the contents of the Report, unless required by the relevant governmental authorities, laws or court orders. 3.The Company shall not be called or be liable to be called to give evidence or testimony on the Report in a court of law without its prior written consent, unless required by the relevant governmental authorities, laws or court orders. 4. The non-CMA report issued by AGC is only permitted to be used by the client as internal reference use and shall not be used for public demonstration purpose. 5. In the event of the improper use of the report as determined by the Company, the Company reserves the right to withdraw it, and to adopt any other additional remedies which may be appropriate. 6. Samples submitted for testing are accepted on the understanding that the Report issued cannot form the basis of, or be the instrument for, any legal action against the Company. 7. The Company will not be liable for or accept responsibility for any loss or damage however arising from the use of information contained in any of its Reports or in any communication whatsoever about its said tests or investigations. 8.Clients wishing to use the Report in court proceedings or arbitration shall inform the Company to that effect prior to submitting the sample for testing. 9. The Company is not responsible for recalling the electronic version of the original report when any revision is made to them. The Client assumes the responsibility to providing the revised version to any interested party who uses them. 10. Subject to the variable length of retention time for test data and report stored hereinto as otherwise specifically required by individual accreditation authorities, the Company will only keep the supporting test data and information of the test report for a period of six years. The data and information will be disposed of after the aforementioned retention period has elapsed. Under no circumstances shall we provide any data and information which has been disposed of after retention period. Under no circumstances shall we be liable for damage of any kind, including (but not limited to) compensatory damages, lost profits, lost data, or any form of special, incidental, indirect, consequential or punitive damages of any kind, whether based on breach of contract of warranty, tort (including negligence), product liability or otherwise, even if we are informed in advance of the possibility of such damages.

Test Setup Photos RADIATED EMISSION TEST SETUP BELOW 1GHz RADIATED EMISSION TEST SETUP ABOVE 1GHz LINE CONDUCTED EMISSION TEST SETUP CONDUCTED EMISSION TEST SETUP