OKUBS2708CASTEREO

ShenzhenJunlanElectronicLtd Room201includingtheEntireBuilding,Building1,No.71LijingSouthRoad ShijingCommunity,ShijingSubdistrict,PingshanDistrict,ShenzhenCity,Guangdong Province,P.R.China TheinformationprovidedinthisletterisbasedonthereferencedrulepartsofTitle47oftheCFRaswellasKDB986446D01. Anexpirationdateforthisletterdoesnotexist.IncasetheU.S.agentchanges,thegranteeisobligatedtonotifytheFCC. FederalCommunicationsCommission AuthorizationandEvaluationDivision EquipmentAuthorizationBranch 7435OaklandMillsRoad Columbia,MD21046 ShenzhenJunlanElectronicLtd [ Room201includingtheEntireBuilding,Building1,No.71LijingSouthRoad ShijingCommunity,ShijingSubdistrict,PingshanDistrict,ShenzhenCity,GuangdongProvince,P.R.] [China] FRN:0021880893 4/16/26 U.S.AgentDesignation [ShenzhenJunlanElectronicLtd]acknowledgestheirconsentforthefollowingcontactlocatedinthe UnitedStatestoactastheiragentforserviceofprocessfortheequipmentforwhichauthorizationis sought(FCCID:OKUBS2708CA) NameofU.S.agent:TimPayne CompanyU.S.agent:FCCUSAgent,LLC PhysicalU.S.addressofagent:3722IllinoisAvenue,SaintCharles,IL,60174, FRNofU.S.agent:0033402884 EmailaddressofU.S.agent:[email protected] PhoneofU.S.agent: FCCUSAgent,LLCacknowledgestheirobligationtoacceptserviceofprocessonbehalfof [ShenzhenJunlanElectronicLtd]. [ShenzhenJunlanElectronicLtd]acceptsitsobligationtomaintainanagentforserviceofprocessin theUnitedStatesfornolessthanoneyearaftereitherthegranteehaspermanentlyterminatedall marketingandimportationoftheapplicableequipmentwithintheU.S.,ortheconclusionofany Commission-relatedadministrativeorjudicialproceedinginvolvingtheequipment,whicheverislater. Bysigningthisform,weconfirmtheaboveandthatweareawareoftheapplicationrequirements listedunder§2.911(d)(7). Sincerely, Signature YoukChen safetyengineer ShenzhenJunlanElectronicLtd Signature [Name] [Title] [Company] 4 8 _ [ m o d e l ] U S _ A g e n t _ 2 . 9 1 1 ( d ) ( 7 ) - U , V 0 3

Page 1 of 3 FCC ID: OKUBS2708CA External Photos Page 2 of 3 FCC ID: OKUBS2708CA Page 3 of 3 FCC ID: OKUBS2708CA

Label FCC ID: OKUBS2708CA

Page 1 of 4 FCC ID: OKUBS2708CA Internal Photos Page 2 of 4 FCC ID: OKUBS2708CA PCB ANT Page 3 of 4 FCC ID: OKUBS2708CA Page 4 of 4 FCC ID: OKUBS2708CA

Page 1 of 8 Report No.: AiTSZ-260319091FW3 Note: This device has been tested and found to comply with the standard(s) listed, this 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. This report shall not be reproduced except in full, without the written approval of Guangdong Asia Hongke Test Technology Limited. If there is a need to alter or revise this document, the right belongs to Guangdong Asia Hongke Test Technology Limited, and it should give a prior written notice of the revision document. This test report must not be used by the client to claim product endorsement. Guangdong Asia Hongke Test Technology Limited B1/F, Building 11, Junfeng Industrial Park, Chongqing Road, Heping Community, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China. RF Exposure evaluation Product Name : STEREO Brand Name : JBL Model : JBL-AURA-BTA-M Series Model : BS-2708CA, JBL-AURA-BTA FCC ID : OKUBS2708CA Applicant : Shenzhen Junlan Electronic Ltd Address : Room 201 including the Entire Building, Building 1, No. 71 Lijing South Road Shijing Community, Shijing Subdistrict, Pingshan District, Shenzhen City, Guangdong Province, P.R.China Manufacturer : Shenzhen Junlan Electronic Ltd Address : Room 201 including the Entire Building, Building 1, No. 71 Lijing South Road Shijing Community, Shijing Subdistrict, Pingshan District, Shenzhen City, Guangdong Province, P.R.China Standard(s) : 47CFR §1.1310, 47CFR §2.1091 KDB447498 D01 General RF Exposure Guidance v06 Date of Receipt : Mar. 19, 2026 Date of Test : Mar. 19, 2026~ Mar. 28, 2026 Issued Date : Mar. 28, 2026 Issued By: Guangdong Asia Hongke Test Technology Limited B1/F, Building 11, Junfeng Industrial Park, Chongqing Road, Heping Community, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China Tel.: +86 0755-230967639 Fax.: +86 0755-230967639 Reviewed by: Approved by: Aalen.Ye Allen Wang Page 2 of 8 Report No.: AiTSZ-260319091FW3 Report Revise Record Report Version Issued Date Notes M0 Mar. 28, 2026 Initial Release Page 3 of 8 Report No.: AiTSZ-260319091FW3 Contents 1 GENERAL INFORMATION .......................................................................................................................................... 4 1.1 ENVIRONMENTAL CONDITIONS ........................................................................................................................................ 4 1.2 GENERAL DESCRIPTION OF EUT ...................................................................................................................................... 4 1.3 TEST FACILITY .............................................................................................................................................................. 5 1.4 MEASUREMENT UNCERTAINTY ........................................................................................................................................ 5 2 METHOD OF MEASUREMENT ................................................................................................................................... 6 2.1 APPLICABLE STANDARD.................................................................................................................................................. 6 2.2 LIMIT ......................................................................................................................................................................... 6 2.3 MPE CALCULATION METHOD ......................................................................................................................................... 7 2.4 MANUFACTURING TOLERANCE ........................................................................................................................................ 7 2.5 STANDALONE MPE RESULT ............................................................................................................................................ 8 2.6 CONCLUSION ............................................................................................................................................................... 8 Page 4 of 8 Report No.: AiTSZ-260319091FW3 1 GENERAL INFORMATION 1.1 Environmental conditions During the measurement the environmental conditions were within the listed ranges: Normal Temperature: 25°C Relative Humidity: 55 % Air Pressure: 101 kPa 1.2 General Description of EUT Product Name: STEREO Model/Type reference: JBL-AURA-BTA-M Serial Model: BS-2708CA, JBL-AURA-BTA Model difference: All the models are electrically identical with the same mechanical structure and design except the model names and the sales regions are different. Power Ratings Input: DC 12-15V6A Hardware Version: N/A Software Version: N/A Sample(s) Status: AiTSZ-260319091-1(Normal sample) AiTSZ-260319091-2(Engineer sample) Bluetooth : Supported type: Bluetooth BR/EDR Modulation: GFSK, π/4DQPSK, 8DPSK Operation frequency: 2402MHz~2480MHz Channel number: 79 Channel separation: 1MHz Antenna type: PCB antenna Antenna gain: 2.29dBi Bluetooth LE: Supported type: Bluetooth LE 1M/2M Modulation: GFSK Operation frequency: 2402MHz~2480MHz Channel number: 40 Channel separation: 2MHz Antenna type: PCB antenna Antenna gain: 2.29dBi Remark: The above DUT's information was declared by manufacturer. For more detailed features description, please refer to the manufacturer’s specifications or the User's Manual. Page 5 of 8 Report No.: AiTSZ-260319091FW3 1.3 Test Facility Test Laboratory: Guangdong Asia Hongke Test Technology Limited B1/F, Building 11, Junfeng Industrial Park, Chongqing Road, Heping Community, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China The test facility is recognized, certified or accredited by the following organizations: FCC-Registration No.: 251906 Designation Number: CN1376 Guangdong Asia Hongke Test Technology Limited has been registered and fully described in a report filed with the (FC…

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Page 1 of 37 Report No.: AiTSZ-260319091FW1 Note: This device has been tested and found to comply with the standard(s) listed, this 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. This report shall not be reproduced except in full, without the written approval of Guangdong Asia Hongke Test Technology Limited. If there is a need to alter or revise this document, the right belongs to Guangdong Asia Hongke Test Technology Limited, and it should give a prior written notice of the revision document. This test report must not be used by the client to claim product endorsement. Guangdong Asia Hongke Test Technology Limited B1/F, Building 11, Junfeng Industrial Park, Chongqing Road, Heping Community, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China. TEST REPORT Product Name : STEREO Brand Name : JBL Model : JBL-AURA-BTA-M Series Model : BS-2708CA, JBL-AURA-BTA FCC ID : OKUBS2708CA Applicant : Shenzhen Junlan Electronic Ltd Address : Room 201 including the Entire Building, Building 1, No. 71 Lijing South Road Shijing Community, Shijing Subdistrict, Pingshan District, Shenzhen City, Guangdong Province, P.R.China Manufacturer : Shenzhen Junlan Electronic Ltd Address : Room 201 including the Entire Building, Building 1, No. 71 Lijing South Road Shijing Community, Shijing Subdistrict, Pingshan District, Shenzhen City, Guangdong Province, P.R.China Standard(s) : FCC CFR Title 47 Part 15 Subpart C Section 15.247 Date of Receipt : Mar. 19, 2026 Date of Test : Mar. 19, 2026~ Mar. 28, 2026 Issued Date : Mar. 28, 2026 Issued By: Guangdong Asia Hongke Test Technology Limited B1/F, Building 11, Junfeng Industrial Park, Chongqing Road, Heping Community, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China Tel.: +86 0755-230967639 Fax.: +86 0755-230967639 Reviewed by: Approved by: Aalen.Ye Allen Wang Page 2 of 37 Report No.: AiTSZ-260319091FW1 Report Revise Record Report Version Issued Date Notes M0 Mar. 28, 2026 Initial Release Page 3 of 37 Report No.: AiTSZ-260319091FW1 Contents 1 TEST SUMMARY ....................................................................................................................................................... 4 1.1 TEST STANDARDS ......................................................................................................................................................... 4 1.2 TEST SUMMARY ........................................................................................................................................................... 4 1.3 TEST FACILITY .............................................................................................................................................................. 5 1.4 MEASUREMENT UNCERTAINTY ........................................................................................................................................ 5 2 GENERAL INFORMATION .......................................................................................................................................... 6 2.1 ENVIRONMENTAL CONDITIONS ........................................................................................................................................ 6 2.2 GENERAL DESCRIPTION OF EUT ...................................................................................................................................... 6 2.3 DESCRIPTION OF TEST MODES AND TEST FREQUENCY .......................................................................................................... 7 2.4 SPECIAL ACCESSORIES ................................................................................................................................................... 8 2.5 EQUIPMENT LIST FOR THE TEST ....................................................................................................................................... 8 3 TEST CONDITIONS AND RESULTS ............................................................................................................................ 10 3.1 CONDUCTED EMISSIONS TEST ....................................................................................................................................... 10 3.2 RADIATED EMISSIONS AND BAND EDGE .......................................................................................................................... 13 3.3 MAXIMUM PEAK OUTPUT POWER................................................................................................................................. 20 3.4 20DB BANDWIDTH ..................................................................................................................................................... 21 3.5 OCCUPIED BANDWIDTH ............................................................................................................................................... 22 3.6 FREQUENCY SEPARATION ............................................................................................................................................. 23 3.7 NUMBER OF HOPPING FREQUENCY ................................................................................................................................. 24 3.8 TIME OF OCCUPANCY (DWELL TIME) .............................................................................................................................. 25 3.9 OUT-OF-BAND EMISSIONS ........................................................................................................................................... 26 3.10 PSEUDORANDOM FREQUENCY HOPPING SEQUENCE .......................................................................................................... 28 3.11 ANTENNA REQUIREMENT ............................................................................................................................................. 29 4 TEST SETUP PHOTOGRAPHS…

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Antenna specification 1 Project: BS- 2708CA Prepared by : Date : 2026-03-18 M anufacturer: Shenzhen Junlan Electronic Ltd A ddress: Room 201 including the Entire Building, Building 1, No. 71 Lijing South Road Shijing C ommunity, Shijing Subdistrict, Pingshan District ,Shenzhen City, Guangdong Province, P.R.China Catalogue * 2. Antenna appearance and dimensions * 3. Antenna parameter details * 1. Overview of antenna parameters 2 1.Overview of antenna parameters 3 Frequency 2400～2500MHZ Effi AVG62.68% PK Gain2.29dBi SWR<2 Antenna Type Onboard copper antenna Antenna polarization Linear polarization PART NOANT-BS-2708CA Antenna size L27.1*W5.6mm 2.Antenna appearance and dimensions 4 Antenna type:ANT-BS-2708CA dimensions: L27.1*W5.6mm 3.Antenna parameter details 5 Antenna pattern: antenna effeciency S11 parameter Passive 自由 频率(MHz)效率(%)效率(dB)增益(dBi) 240059.17-2.281.96 241060.68-2.172.18 242061.22-2.132.04 243061.57-2.112.19 244062.97-2.012.28 245063.91-1.942.12 246063.89-1.952.27 247064.28-1.922.29 248064.83-1.882.25 249064.03-1.942.15 250062.89-2.012.01 平均值62.68 -2.032.16 The End 2020/6/2 6

Page 1 of 18 Report No.: AiTSZ-260319091FW1 Conducted Output Power Test Result Modulation Packet Type Channel Peak Output Power (dBm) Peak Output Power (mW) Max. Avg. Power (dBm) Limit (dBm) Result GFSK DH5 0 -0.76 0.84 -1.04 ≤30 PASS 39 -0.66 0.86 -1.28 PASS 78 -2.62 0.55 -2.59 PASS π/4DQPSK 2-DH5 0 -1.64 0.69 -4.34 ≤20.97 PASS 39 -1.29 0.74 -4.47 PASS 78 -2.86 0.52 -6.12 PASS 8DPSK 3-DH5 0 -1.09 0.78 -4.40 PASS 39 -1.27 0.75 -4.59 PASS 78 -3.00 0.50 -6.25 PASS Modulation Packet Type Channel Peak Output Power (dBm) Peak Power Limit (dBm) ISED EIRP (dBm) ISED EIRP Limit (dBm) Max. Avg. Power (dBm) Result GFSK DH5 0 -0.76 ≤30 1.530 ≤36.02 -1.04 PASS 39 -0.66 ≤30 1.630 ≤36.02 -1.28 PASS 78 -2.62 ≤30 -0.330 ≤36.02 -2.59 PASS π/4DQPSK 2-DH5 0 -1.64 ≤20.97 0.650 ≤36.02 -4.34 PASS 39 -1.29 ≤20.97 1.000 ≤36.02 -4.47 PASS 78 -2.86 ≤20.97 -0.570 ≤36.02 -6.12 PASS 8DPSK 3-DH5 0 -1.09 ≤20.97 1.200 ≤36.02 -4.40 PASS 39 -1.27 ≤20.97 1.020 ≤36.02 -4.59 PASS 78 -3.00 ≤20.97 -0.710 ≤36.02 -6.25 PASS Test Graphs Peak Output Power GFSK_Channel 0 Peak Output Power GFSK_Channel 39 Page 2 of 18 Report No.: AiTSZ-260319091FW1 Peak Output Power GFSK_Channel 78 Peak Output Power π/4DQPSK_Channel 0 Peak Output Power π/4DQPSK_Channel 39 Peak Output Power π/4DQPSK_Channel 78 Peak Output Power 8DPSK_Channel 0 Peak Output Power 8DPSK_Channel 39 Peak Output Power Page 3 of 18 Report No.: AiTSZ-260319091FW1 8DPSK_Channel 78 Average Output Power GFSK_Channel 0 Average Output Power GFSK_Channel 39 Average Output Power GFSK_Channel 78 Average Output Power π/4DQPSK_Channel 0 Average Output Power π/4DQPSK_Channel 39 Average Output Power π/4DQPSK_Channel 78 Page 4 of 18 Report No.: AiTSZ-260319091FW1 Average Output Power 8DPSK_Channel 0 Average Output Power 8DPSK_Channel 39 Average Output Power 8DPSK_Channel 78 Page 5 of 18 Report No.: AiTSZ-260319091FW1 20dB Bandwidth Test Result Modulation Channel Center Frequency (MHz) 20 dB Bandwidth (MHz) GFSK 0 2402 MHz 0.8400 39 2441 MHz 0.8500 78 2480 MHz 0.8500 π/4DQPSK 0 2402 MHz 1.260 39 2441 MHz 1.260 78 2480 MHz 1.270 8DPSK 0 2402 MHz 1.260 39 2441 MHz 1.270 78 2480 MHz 1.280 Test Graphs GFSK_DH5_Channel 0 GFSK_DH5_Channel 39 GFSK_DH5_Channel 78 π/4DQPSK_2-DH5_Channel 0 π/4DQPSK_2-DH5_Channel 39 π/4DQPSK_2-DH5_Channel 78 Page 6 of 18 Report No.: AiTSZ-260319091FW1 8DPSK_3-DH5_Channel 0 8DPSK_3-DH5_Channel 39 8DPSK_3-DH5_Channel 78 Page 7 of 18 Report No.: AiTSZ-260319091FW1 Carrier Frequencies Separation Test Result Modulation Packet Left Center frequency (MHz) Right Center frequency (MHz) Hopping Frequency Separation (MHz) Limit (MHz) Result GFSK DH5 2439.8424 2441.1556 1.3131 0.99 PASS π/4DQPSK 2-DH5 2440.1425 2440.8275 0.6851 0.99 PASS 8DPSK 3-DH5 2440.1599 2440.8319 0.6721 0.99 PASS Test Graphs GFSK π/4DQPSK 8DPSK Page 8 of 18 Report No.: AiTSZ-260319091FW1 Conducted Out Of Band Emission Test Result Non-Hopping Modulation Packet Channel OOB Emission Frequency (MHz) OOB Emission Level (dBm) Limit (dBm) Over Limit (dB) Result GFSK DH5 0 2400.00 -60.660 -13.98 -46.680 PASS 2618.76 -45.853 -13.98 -31.873 PASS 39 5186.31 -47.288 -21.05 -26.238 PASS 78 1764.17 -39.763 -22.33 -17.433 PASS 2483.50 -63.920 -22.33 -41.590 PASS π/4DQPSK 2-DH5 0 1763.50 -29.557 -21.34 -8.217 PASS 2398.50 -61.368 -21.34 -40.028 PASS 2400.00 -62.370 -21.34 -41.030 PASS 39 1753.55 -28.252 -21.94 -6.311 PASS 78 2483.50 -63.850 -23.21 -40.640 PASS 24016.2 -51.573 -23.21 -28.363 PASS 8DPSK 3-DH5 0 2370.00 -61.564 -21.4 -40.164 PASS 2400.00 -62.020 -21.4 -40.620 PASS 24029.3 -52.030 -21.4 -30.630 PASS 39 24571.8 -52.204 -21.67 -30.534 PASS 78 1764.17 -42.477 -23.31 -19.167 PASS 2483.50 -64.370 -23.31 -41.060 PASS Hopping Modulation Packet Channel OOB Emission Frequency (MHz) OOB Emission Level (dBm) Limit (dBm) Over Limit (dB) Result GFSK DH5 Hopping 2366.40 -61.015 -20.18 -40.835 PASS 2400.00 -62.120 -20.18 -41.940 PASS 2483.50 -62.360 -21.44 -40.920 PASS π/4DQPSK 2-DH5 2372.90 -60.662 -20.68 -39.982 PASS 2400.00 -62.840 -20.68 -42.160 PASS 2483.50 -62.290 -22.46 -39.830 PASS 8DPSK 3-DH5 2386.90 -60.840 -20.99 -39.850 PASS 2400.00 -62.120 -20.99 -41.130 PASS 2483.50 -63.240 -22.67 -40.570 PASS Test Graphs Page 9 of 18 Report No.: AiTSZ-260319091FW1 Out Of Band Emission GFSK_DH5_Channel 0 Out Of Band Emission π/4DQPSK_2-DH5_Channel 0 30.0 MHz - 25000.0 MHz GFSK_DH5_Channel 0 30.0 MHz - 25000.0 MHz π/4DQPSK_2-DH5_Channel 0 Out Of Band Emission GFSK_DH5_Channel 39 Out Of Band Emission π/4DQPSK_2-DH5_Channel 39 30.0 MHz - 25000.0 MHz GFSK_DH5_Channel 39 30.0 MHz - 25000.0 MHz π/4DQPSK_2-DH5_Channel 39 Page 10 of 18 Report No.: AiTSZ-260319091FW1 Out Of Band Emission GFSK_DH5_Channel 78 Out Of Band Emission π/4DQPSK_2-DH5_Channel 78 30.0 MHz - 25000.0 MHz GFSK_DH5_Channel 78 30.0 MHz - 25000.0 MHz π/4DQPSK_2-DH5_Channel 78 Out Of Band Emission 8DPSK_3-DH5_Channel 0 30.0 MHz - 25000.0 MHz 8DPSK_3-DH5_Channel 0 Page 11 of 18 Report No.: AiTSZ-260319091FW1 Out Of Band Emission 8DPSK_3-DH5_Channel 39 30.0 MHz - 25000.0 MHz 8DPSK_3-DH5_Channel 39 Out Of Band Emission 8DPSK_3-DH5_Channel 78 30.0 MHz - 25000.0 MHz 8DPSK_3-DH5_Channel 78 Out Of Band Emission(Left) GFSK_DH5_Channel Hopping Out Of Band Emission(Left) π/4DQPSK_2-DH5_Channel Hopping Page 12 of 18 Report No.: AiTSZ-260319091FW1 Out Of Band Emission(Right) GFSK_DH5_Channel Hopping Out Of Band Emission(Right) π/4DQPSK_2-DH5_Channel Hopping Out Of Band Emission(Left) 8DPSK_3-DH5_Channel Hopping Out Of Band Emission(Right) 8DPSK_3-DH5_Channel Hopping Page 13 of 18 Report No.: AiTSZ-260319091FW1 Duty Cycle Test Result Modulation Packets Channel On Time (ms) Period (ms) Duty Cycle (%) Duty Cycle (linear) Duty Cycle Factor (dB) 1/T GFSK DH5 0 2.878 3.748 76.79 0.7679 1.147 0.3475 39 2.876 3.748 76.73 0.7673 1.1503 0.3477 78 2.878 3.748 76.79 0.7679 1.147 0.3475 π/4DQPSK 2-DH5 0 2.880 3.748 76.84 0.7684 1.1441 0.3472 39 2.882 3.748 76.89 0.7689 1.1413 0.3470 78 2.880 3.748 76.84 0.7684 1.1441 0.3472 8DPSK 3-DH5 0 2.882 3.748 76.89 0.7689 1.1413 0.3470 39 2.884 3.748 …

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Page 1 of 2 FCC ID: OKUBS2708CA Page 2 of 2 FCC ID: OKUBS2708CA