2ACP4LSPBT2Bluetooth speaker

Sentry Industries Limited UNIT 904, 9/F CHINACHEM GOLDEN PLAZA, 77 MODY ROAD, TSIM SHA TSUI EAST, KOWLOON, HONG KONG, China May 10, 2023 Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Subject: Explanation of differences between product types FCC ID : 2ACP4LSPBT2 Model Number: SPBT2, SPGXLU, SPBTGX, SPBTGXLU, DGS- 2PKGXLU, 2PKGXLU, SPBT17, SPBT16 To Whom It May Concern: We, The Sentry Industries Limited hereby declare that the models are identical except the model name. Except for the different above, no other modification is performed. Sincerely, Signature: Contact person: Peetu Melwani

Sentry Industries Limited UNIT 904, 9/F CHINACHEM GOLDEN PLAZA, 77 MODY ROAD, TSIM SHA TSUI EAST, KOWLOON, HONG KONG, China Agent Authorization Company: Sentry Industries Limited Address: UNIT 904, 9/F CHINACHEM GOLDEN PLAZA, 77 MODY ROAD, TSIM SHA TSUI EAST, KOWLOON, HONG KONG, China Product Name: Bluetooth speaker Model Number(s): SPBT2, SPGXLU, SPBTGX, SPBTGXLU, DGS-2PKGXLU, 2PKGXLU, SPBT17, SPBT16 Product Description: Bluetooth speaker We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: 2023-05-10 Name: Peetu Melwani Company: Sentry Industries Limited

Report No.: AGC08189230402AP02 Page 1 of 3 EXTERNAL PHOTOS TOP VIEW OF EUT BOTTOM VIEW OF EUT Report No.: AGC08189230402AP02 Page 2 of 3 FRONT VIEW OF EUT BACK VIEW OF EUT Report No.: AGC08189230402AP02 Page 3 of 3 LEFT VIEW OF EUT RIGHT VIEW OF EUT ****************************************End of Report*************************************

FCC ID Label Location 30mm&30mm FCC ID: 2ACP4LSPBT2

Report No.: AGC08189230402AP02 Page 1 of 4 INTERNAL PHOTOS PORT VIEW OF EUT OPEN VIEW OF EUT Report No.: AGC08189230402AP02 Page 2 of 4 BATTERY VIEW OF EUT INTERNAL VIEW OF EUT (FIGURE 1) BT Antenna Report No.: AGC08189230402AP02 Page 3 of 4 INTERNAL VIEW OF EUT (FIGURE 2) INTERNAL VIEW OF EUT (FIGURE 3) Report No.: AGC08189230402AP02 Page 4 of 4 INTERNAL VIEW OF EUT (FIGURE 4) INTERNAL VIEW OF EUT (FIGURE 5) ****************************************End of Report*************************************

RF EXPOSURE EVALUATION 1. PRODUCT INFORMATION FCC ID 2ACP4LSPBT2 Product Description Bluetooth speaker Model Name SPBT2, SPGXLU, SPBTGX, SPBTGXLU, DGS-2PKGXLU, 2PKGXLU, SPBT17, SPBT16 Frequency Band (Operating) WLAN: 2.412GHz ~ 2.462GHz WLAN: 5.18GHz ~ 5.32GHz / 5.50GHz ~ 5.70GHz WLAN: 5.745GHz ~ 5825GHz Bluetooth: 2.402GHz ~ 2.480GHz Others (NFC:13.56MHz) Device Category Portable (<20cm separation) Mobile (>20cm separation) Others: Antenna Diversity Single antenna Multiple antennas Max. Output Power -2.905dBm (Max) Antenna Gain -0.68dBi Minimum Assessment Distance 5mm Evaluation Applied MPE Evaluation SAR Evaluation Evaluation Result Pass 2. PORTABLE DEVICE EVALUATION METHOD AND LIMIT Following FCC KDB 447498 D01 “General SAR test exclusion guidance” The corresponding SAR Exclusion Threshold condition, listed below: 1) 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)] [if(GHz)] s 3.0 for 1-g SAR and ñ 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.  The result is rounded to one decimal place for comparison The test exclusions are applicable only when the minimum test separation distance is ≤50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. 2) At 100 MHz to 6 GHz and for test separation distances > 50 mm, the SAR test exclusion threshold is determined according to the following: a) [Threshold at 50 mm in step 1) + (test separation distance - 50mm) ( f(MHz)/150)] mW, at 100MHz to 1500 MHz; b) [Threshold at 50 mm in step 1) + (test separation distance - 50 mm)-10] mW at > 1500 MHz and ≤6 GHz; 3) At frequencies below 100 MHz, the following may be considered for SAR test exclusion. a) The threshold at the corresponding test separation distance at 100 MHz in step 2) is multiplied by [1 + log(100/f(MHz))] for test separation distances > 50 mm and < 200 mm. b) The threshold determined by the equation in a) for 50 mm and 100 MHz is multiplied by 1/2 for test separation distances ñ 50 mm. c) SAR measurement procedures are not established below 100 MHz. When SAR test exclusion cannot be applied, a KDB inquiry is required to determine SAR evaluation requirements for any test results to be acceptable. 3. MOBILE DEVICE EVALUATION METHOD AND LIMIT Human exposure to RF emissions from mobile devices (47 CFR §2.1091) may be evaluated based on the MPE limits adopted by the FCC for electric and magnetic field strength and/or power density, as appropriate, since exposures are assumed to occur at distances of 20 cm or more from persons. LIMITS FOR GENERAL POPULATION / UNCONTROLLED EXPOSURE Frequency Range (MHz) E-field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/cm 2 ) Averaging Time |E| 2 , |H| 2 or S (Minutes) 0.3 -- 1.34 614 1.63 (100)* 30 1.34 -- 30 824/f 2.19/f (180/f 2 )* 30 30 -- 300 27.5 0.073 0.2 30 300 -- 1500 -- -- f/1500 30 1500 -- 100,000 -- -- 1.0 30 *Note: 1. f= Frequency in MHz * Plane-wave Equivalent Power Density 2. The averaging time for General Population/Uncontrolled exposure to fixed transmitters is not applicable for mobile and portable transmitters. See 47 CFR §§2.1091 and 2.1093 on source-based time-averaging requirement for mobile and portable transmitters. S=PG/4πR² Where: S=power density P=power input to antenna G=power gain of the antenna in the direction of interest relative to an isotropic radiator R=distance to the center of radiation of the antenna 4. MEASUREMENT RESULT Test Mode Channel Frequency (MHz) Max Output power (dBm) Max Output power (mW) Calculati on Value (Note 1) Threshold Value 8DPSK BT_BR 2402 -2.905 0.51 0.158 3.0 Note 1: Calculation Value =[(max. power of channel, mW)/(min. test separation distance, mm)] ·[√f(GHz)]. Fox example: 0.51/5*√2.402=0.158 ≤ 3.0 According to KDB447498 D01 V06, threshold at which no SAR required is ≤3.0 for 1-g SAR, separation distance is 5mm, and no simultaneous SAR measurement is required. 5. CONCLUSION Since Source-base time average power is below SAR test exclusion power thresholds, the SAR evaluation is not required.

Inverted F Antenna Specification Summary ITEMANT SPEC Model Name 2.4G ANT HorizontalVertical 2400MHz 2400MHz2500MHz2400MHz2400MHz 2500MHz Center Frequency -1.73 -0.84 -0.68 -6.15 -3.70 -2.32 MAX. Gain -0.68dBi PolarizationHorizontal and Vertical Azimuth Beam Pattern Omni-directional Impedance50 Ohm Antenna Length 38.20mm Manufacture ZHUHAI JIELI TECHNOLOGY CO.,LTD Antenna Photo & Length (mm) Horizontal: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -40 Scale: 5/div Gain(dBi) Frequency (MHz) MaxMinAvg 2400-1.73178-30.0815-8.48713 2450-0.845801-38.5605-7.88012 2500-0.685586-24.0318-6.79139 Vertical: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -30 Scale: 5/div Gain(dBi) Frequency (MHz) MaxMinAvg 2400-6.1530-24.1420-13.0295 2450-3.7054-26.5836-10.6700 2500-2.32122-30.4301-9.70536

Page 1 of 69 FCC Test Report Report No.: AGC08189230402FE03 FCC ID : 2ACP4LSPBT2 APPLICATION PURPOSE : Original Equipment PRODUCT DESIGNATION : Bluetooth speaker BRAND NAME : SENTRY MODEL NAME : SPBT2, SPGXLU, SPBTGX, SPBTGXLU, DGS-2PKGXLU, 2PKGXLU, SPBT17, SPBT16 APPLICANT : Sentry Industries Limited DATE OF ISSUE : May 08, 2023 STANDARD(S) : FCC Part 15.247 REPORT VERSION : V1.0 Attestation of Global Compliance (Shenzhen) Co., Ltd Report No.: AGC08189230402FE03 Page 2 of 69 REPORT REVISE RECORD Report Version Revise Time Issued Date Valid Version Notes V1.0 / May 08, 2023 Valid Initial Release Report No.: AGC08189230402FE03 Page 3 of 69 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 ........................................................................................................................................ 19 8.1. MEASUREMENT PROCEDURE ............................................................................................................. 19 8.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................... 19 8.3. LIMITS AND MEASUREMENT RESULTS ............................................................................................... 20 9. CONDUCTED SPURIOUS EMISSION........................................................................................................... 25 9.1. MEASUREMENT PROCEDURE ............................................................................................................. 25 Report No.: AGC08189230402FE03 Page 4 of 69 9.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................... 25 9.3. MEASUREMENT EQUIPMENT USED .................................................................................................... 25 9.4. LIMITS AND MEASUREMENT RESULT .................................................................................................. 25 10. RADIATED EMISSION ................................................................................................................................. 46 10.1. MEASUREMENT PROCEDURE ........................................................................................................... 46 10.2. TEST SETUP ......................................................................................................................................... 48 10.3. LIMITS AND MEASUREMENT RESULT ............................................................................................... 49 10.4. TEST RESULT........................................................................................................................................ 49 11. NUMBER OF HOPPING FREQUENCY ...................…

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Report No.: AGC08189230402FE03 Page 64 of 69 13. FREQUENCY SEPARATION 13.1. MEASUREMENT PROCEDURE The EUT shall have its hopping function enabled. Use the following spectrum analyzer settings: 1. Span: Wide enough to capture the peaks of two adjacent channels. 2. RBW: Start with the RBW set to approximately 30% of the channel spacing; adjust as necessary to best identify the center of each individual channel. 3. Video (or average) bandwidth (VBW) ≥ RBW. 4. Sweep: Auto. e) Detector function: Peak. f) Trace: Max hold. g) Allow the trace to stabilize. Use the marker-delta function to determine the separation between the peaks of the adjacent channels. 13.2. TEST SETUP (BLOCK DIAGRAM OF CONFIGURATION) Same as described in section 6.2 13.3. MEASUREMENT EQUIPMENT USED The same as described in section 6.3 13.4. LIMITS AND MEASUREMENT RESULT Test Data of Frequency Separation Test Mode Channel Separation (MHz) Limits Pass or Fail GFSK Hopping 0.977 >= 2/3 -20dB BW Pass Test Graphs of Number of Hopping Frequency Test_Graph_BR_HOP_ANT1_NA_1Mbps_Hopping Separation Note: The GFSK modulation is the worst case and recorded in the report. Report No.: AGC08189230402FE03 Page 65 of 69 14. LINE CONDUCTED EMISSION TEST 14.1. LIMITS OF LINE CONDUCTED EMISSION TEST Frequency Maximum RF Line Voltage Q.P. (dBμV) Average (dBμV) 150kHz~500kHz 66-56 56-46 500kHz~5MHz 56 46 5MHz~30MHz 60 50 Note: 1. The lower limit shall apply at the transition frequency. 2. The limit decreases linearly with the logarithm of the frequency in the range 0.15 MHz to 0.50 MHz. 14.2. BLOCK DIAGRAM OF LINE CONDUCTED EMISSION TEST EUT & Support Units Report No.: AGC08189230402FE03 Page 66 of 69 14.3. PRELIMINARY PROCEDURE OF LINE CONDUCTED EMISSION TEST 1. The equipment was set up as per the test configuration to simulate typical actual usage per the user’s manual. When the EUT is a tabletop system, a wooden table with a height of 0.8 meters is used and is placed on the ground plane as per ANSI C63.10 (see Test Facility for the dimensions of the ground plane used). When the EUT is a floor-standing equipment, it is placed on the ground plane which has a 3-12 mm non-conductive covering to insulate the EUT from the ground plane. 2. Support equipment, if needed, was placed as per ANSI C63.10. 3. All I/O cables were positioned to simulate typical actual usage as per ANSI C63.10. 4. All support equipment received AC120V/60Hz power from a LISN, if any. 5. The EUT received DC 5V power from adapter which received AC120V/60Hz power from a LISN. 6. The test program was started. Emissions were measured on each current carrying line of the EUT using a spectrum Analyzer / Receiver connected to the LISN powering the EUT. The LISN has two monitoring points: Line 1 (Hot Side) and Line 2 (Neutral Side). Two scans were taken: one with Line 1 connected to Analyzer / Receiver and Line 2 connected to a 50 ohm load; the second scan had Line 1 connected to a 50 ohm load and Line 2 connected to the Analyzer / Receiver. 7. Analyzer / Receiver scanned from 150 kHz to 30MHz for emissions in each of the test modes. 8. During the above scans, the emissions were maximized by cable manipulation. 9. The test mode(s) were scanned during the preliminary test. Then, the EUT configuration and cable configuration of the above highest emission level were recorded for reference of final testing. 14.4. FINAL PROCEDURE OF LINE CONDUCTED EMISSION TEST 1. EUT and support equipment was set up on the test bench as per step 2 of the preliminary test. 2. A scan was taken on both power lines, Line 1 and Line 2, recording at least the six highest emissions. Emission frequency and amplitude were recorded into a computer in which correction factors were used to calculate the emission level and compare reading to the applicable limit. If EUT emission level was less – 2dB to the A.V. limit in Peak mode, then the emission signal was re-checked using Q.P and Average detector. 3. The test data of the worst case condition(s) was reported on the Summary Data page. Report No.: AGC08189230402FE03 Page 67 of 69 14.5. TEST RESULT OF LINE CONDUCTED EMISSION TEST Line Conducted Emission Test Line 1-L Report No.: AGC08189230402FE03 Page 68 of 69 Line Conducted Emission Test Line 2-N RESULT: PASS Note: All the test modes had been tested, the mode 7 was the worst case. Only the data of the worst case would be record in this test report. Report No.: AGC08189230402FE03 Page 69 of 69 APPENDIX A: PHOTOGRAPHS OF TEST SETUP Refer to the Report No.: AGC08189230402AP01 APPENDIX B: PHOTOGRAPHS OF EUT Refer to the Report No.: AGC08189230402AP02 ----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 w…

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Report No.: AGC08189230402AP01 Page 1 of 2 TEST SETUP PHOTOS RADIATED EMISSION TEST SETUP BELOW 1GHz RADIATED EMISSION TEST SETUP ABOVE 1GHz Report No.: AGC08189230402AP01 Page 2 of 2 AC POWER LINE CONDUCTED TEST SETUP RF CONDUCTED TEST SETUP ****************************************End of Report*************************************