2BRSR-CERAMICSULTRAWireless headphones

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FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 Appendix III EUT External Photographs Photo 1 Appearance of EUT Photo 2 Appearance of EUT FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 Photo 3 Appearance of EUT Photo 4 Appearance of EUT FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 Photo 5 Appearance of EUT Photo 6 Appearance of EUT FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 Photo 7 Appearance of EUT

FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 Appendix IID Label Appendix II ID Label Location FCC ID: 2BRSR-CERAMICSULTRA

FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 Appendix IV EUT Internal Photographs Photo 8 Internal of EUT Photo 9 Internal of EUT Antenna Antenna FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 Photo 10 Internal of EUT Photo 11 Appearance of PCB FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 Photo 12 Appearance of PCB Photo 13 Appearance of PCB FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 Photo 14 Appearance of PCB Photo 15 Appearance of PCB FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 Photo 16 Appearance of PCB

Shenzhen Toby Technology Co., Ltd. Report No.: TBR-C-202508-0228-6 Page: 1 of 8 TB-RF-074-1.0 1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China Tel: +86 75526509301 Fax: +86 75526509195 Maximum Permissible Exposure Evaluation FCC ID: 2BRSR-CERAMICSULTRA Report No. : TBR-C-202508-0228-6 Applicant : Chengdu Miaomiao Wangwang Technology Co., Ltd. Equipment Under Test (EUT) EUT Name : Wireless headphones Model No. : CERAMICS Ultra Series Model No. : CERAMICS Brand Name : ROSESELSA Sample ID : HC-C-202508-0228-01-01-1#&HC-C-202508-0228-01-01-2# Receipt Date : 2025-11-26 Test Date : 2025-11-26 to 2025-12-03 Issue Date : 2025-12-03 Standards : FCC Part 2.1093 Test Method : KDB 447498 D01 General RF Exposure Guidance v06 Conclusions : PASS In the configuration tested, the EUT complied with the standards specified above. Test By : Lily. zhang Reviewed By : Wade. Lv Approved By : Ivan Su This report details the results of the testing carried out on one sample. The results contained in this test report do not relate to other samples of the same product. The manufacturer should ensure that all products in series production are in conformity with the product sample detailed in the report. Report No.: TBR-C-202508-0228-6 Page: 2 of 8 TB-RF-074-1.0 CONTENTS CONTENTS ............................................................................................................................................. 2 1. GENERAL INFORMATION ABOUT EUT.............................................................................. 4 1.1 Client Information ................................................................................................................. 4 1.2 General Description of EUT (Equipment Under Test) ................................................... 4 2. MEASUREMENT UNCERTAINTY .......................................................................................... 5 3. TEST FACILITY.......................................................................................................................... 6 4. SAR TEST EXCLUSION CALCULATIONS .......................................................................... 7 Report No.: TBR-C-202508-0228-6 Page: 3 of 8 TB-RF-074-1.0 Revision History Report No. Version Description Issued Date TBR-C-202508-0228-6 Rev.01 Initial issue of report 2025-12-03 Report No.: TBR-C-202508-0228-6 Page: 4 of 8 TB-RF-074-1.0 1. General Information about EUT 1.1 Client Information Applicant : Chengdu Miaomiao Wangwang Technology Co., Ltd. Address : No.100-12 Jinpan Road, Lanting Community, Hesheng Town, Wenjiang District, Chengdu City, China Manufacturer : Shenzhen Joining Free Technology Co., Ltd. Address : Building A, No.6 Tianyang 7th Road, Dongfang Community, Songgang Street, Bao'an District, Shenzhen, China, 518105 1.2 General Description of EUT (Equipment Under Test) EUT Name : Wireless headphones Models No. : CERAMICS Ultra, CERAMICS Model Different : All these models are identical in the same PCB, layout and electrical circuit, the only difference is model name. Product Description : Operation Frequency: Bluetooth V5.0: 2402MHz~2480MHz Modulation Type: GFSK(1Mbps) π/4-DQPSK(2Mbps) 8-DPSK(3Mbps) Max Antenna Gain: -1.48dBi FPC Antenna Power Rating : INPUT: DC 5V Power Rating (Charger Box) : DC 3.7V 400mAh 1.48Wh Rechargeable Li-ion battery Power Rating (Earphone) : DC 3.7V 50mAh 0.185Wh Rechargeable Li-ion battery Software Version : BTW25041-ROSE-20250812-V0.0.10 Hardware Version : v1.2 Remark: The above antenna information is declared by manufacturer and for more detailed features description, please refer to the manufacturer's specifications, the laboratory shall not be held responsible. Report No.: TBR-C-202508-0228-6 Page: 5 of 8 TB-RF-074-1.0 2. Measurement Uncertainty The reported uncertainty of measurement y±U，where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2，providing a level of confidence of approximately 95 %. Test Item Parameters Expanded Uncertainty (ULab) Conducted Emission Level Accuracy: 9kHz~150kHz 150kHz to 30MHz ±3.50 dB ±3.10 dB Radiated Emission Level Accuracy: 9kHz to 30 MHz ±4.60 dB Radiated Emission Level Accuracy: 30MHz to 1000 MHz ±4.50 dB Radiated Emission Level Accuracy: Above 1000MHz ±4.20 dB RF Power-Conducted Level Accuracy: Above 1000MHz ±0.95 dB Power Spectral Density- Conducted Level Accuracy: Above 1000MHz ±3dB Occupied Bandwidth Level Accuracy: 30MHz to 1000 MHz Above 1000MHz ±3.8% Unwanted Emission- Conducted Level Accuracy: 30MHz to 1000 MHz Above 1000MHz ±2.72 dB Temperature / ±0.6°C Humidity / ±4% Supply voltages / ±2% Time / ±4% Report No.: TBR-C-202508-0228-6 Page: 6 of 8 TB-RF-074-1.0 3. Test Facility The testing report were performed by the Shenzhen Toby Technology Co., Ltd., in their facilities located at 1/F., Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China. At the time of testing, the following bodies accredited the Laboratory: CNAS (L5813) The Laboratory has been accredited by CNAS to ISO/IEC 17025: 2017 General Requirements for the Competence of Testing and Calibration Laboratories for the competence in the field of testing. And the Registration No.: CNAS L5813. A2LA Certificate No.: 4750.01 The laboratory has been accredited by American Association for Laboratory Accreditation(A2LA) to ISO/IEC 17025：2017 General Requirements for the Competence of Testing and Calibration Laboratories for the technical competence in the field of Electrical Testing. And the A2LA Certificate No.: 4750.01.FCC Accredited Test Site Number: 854351. Designation Number: CN1223. IC Registration No.: (11950A) The Laboratory has been registered by Certification and Engineering Bureau of Industry Canada for radio equipment testing. The site registration: Site# 11950A. CAB identifier: CN0056. Report No.: TBR-C-202508-0228-6 Page: 7 of 8 TB-RF-074-1.0 4. SAR Test Exclusion Calcula…

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SHENZHENATNCOMMUNICATIONTECHNOLOGYCO.,LTD. Page2Version：A0ATN-PAS-QD-0186 contentPage Cover......1 Catalog......2 1、TestEquipment&Conditions ......3 2、ProductSpecification ......4 3、Matchingcircuit ......4 4、TestDataReport ......4 5、Assemblyrequirements ......7 6、ProductDrawing ......7 7、Sizetestreport ......8 8、Saltspraytestreport ......9 9、PackagingInformation ......10 changerecord DateVersion VersionContent Notes 2025.09.22A0Initialrelease SHENZHENATNCOMMUNICATIONTECHNOLOGYCO.,LTD. Page3Version：A0ATN-PAS-QD-0186 1、TestEquipment&Conditions 1.1 NetworkAnalyzers AgilentTechnologiesE5071B 1.2CommunicationsTestSet CMW500 1.33DChanberTestSystem SHENZHENATNCOMMUNICATIONTECHNOLOGYCO.,LTD. Page4Version：A0ATN-PAS-QD-0186 2、ProductSpecification 2.1 、 Material&MechanicalCharacteristics MaterialFPC AntennatypePIFAantenna 2.2 、 Storageconditions StorageTemperature 22 °C ±5 °C relativehumidity35-65% Storagelife360Day 3、Matchingcircuit Theleftandrightmatchingcircuitsarethesame 4、TestDataReport 4.1S11Parameter LR SHENZHENATNCOMMUNICATIONTECHNOLOGYCO.,LTD. Page5Version：A0ATN-PAS-QD-0186 4.2Gain&Efficiency LR 4.3Radiationpattern L SHENZHENATNCOMMUNICATIONTECHNOLOGYCO.,LTD. Page6Version：A0ATN-PAS-QD-0186 R 4.4OTATestData PCBAtestdata BluetoothBR (Free) BluetoothBR (head) SHENZHENATNCOMMUNICATIONTECHNOLOGYCO.,LTD. Page7Version：A0ATN-PAS-QD-0186 4.5Measureddata TestingLocation:MeishengChuangguScienceandTechnologyInnovationPark。 TestmobileSamsungS8 Listentomusicinalldirections(m)15 5、Assemblyrequirements 1 Learphones:Thebatterycableiswound 8times,withthepositivepolefacing themotherboardandthebatterycable placedawayfromthemagnet。 2 Rearphones:Thebatterycableiswound 8times,withthenegativesideofthe batteryfacingthemotherboard,andthe batterycableisplacedawayfromthe magnet。 6、ProductDrawing SHENZHENATNCOMMUNICATIONTECHNOLOGYCO.,LTD. Page8Version：A0ATN-PAS-QD-0186 7、Sizetestreport project：RS18-WQ7034ProductName： AntennaL/AntennaR category：FPCQuantity：5pcsDate：2025.09.22 Inspectionbasisand standard ■Engineeringdrawings □Standardtemplate □Other Measurementequipment &accuracy Verniercaliper&0.02mm Inspectionitems testvalue determine 12345 Dimensiona linspection 1.L 2.0.13±0.030.120.120.120.120.12ok 3.13±0.1513.0413.0213.0413.0813.06ok 4.12.09±0.1512.1612.1212.1612.1212.14ok 5.R 6.13±0.1513.0613.1013.0613.0413.06ok 7.12.09±0.1512.0812.1012.1612.1412.12ok 8.0.13±0.030.120.120.120.120.12ok 9./ 10. 11. 12. SHENZHENATNCOMMUNICATIONTECHNOLOGYCO.,LTD. Page9Version：A0ATN-PAS-QD-0186 8、Saltspraytestreport projectRS18-WQ7034 ProductName ： AntennaL/AntennaR Sample information quantity：5PCS materialquality：Electrolyticcopper Coating ： Goldplating T e s t c o n d i t i o n s Saltsolution ： 5% PH:7.0 Testtemperature ： 35°Crelativehumidity ： 5% Spraymode：■连续□间歇airpressure：1kg/cm² Saltspraysettlingrate ： Mistcollection ： PH7.0nac Testcycle：__1__Spraytime：24h testresult Appearanceaftertest:theappearanceisintactwithoutobviouschange Coating:nopeelingandcorrosion Surfacesprayingandsilkscreenprinting:nofallingoffandbubble Test judgment OK Notes： 1、Theoperationstandardofsaltspraytestshallbeinaccordancewiththenationalstandardof thepeople'sRepublicofChinaGB/t242317-2008implementation. 2 、 Thejudgmentstandardoftestpieceresultsshallbeinaccordancewiththenational standardofthepeople'sRepublicofChinaGB/t6461-02. SHENZHENATNCOMMUNICATIONTECHNOLOGYCO.,LTD. Page10Version：A0ATN-PAS-QD-0186 9、Mannerofpacking SHENZHENATNCOMMUNICATIONEQUIPMENTCO.LTD Productpackaging Version：：A0Page：1/1 1.Barrierpaperprotectionproducts2.PutintoPEsealedpocket 3.Putitinacardboardboxforpackaging

Shenzhen Toby Technology Co., Ltd. Http://www.tobylab.cn Add：1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China. Report No.: TBR-C-202508-0228-4 Page: 1 of 75 FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 RF Test Data for Bluetooth (Conducted Measurements) General Description of EUT Product Name: Wireless headphones Test Model: CERAMICS Ultra Sample ID: HC-C-202508-0228-01-01-2# Environmental Conditions Temperature: 23.8°C Relative Humidity: 48% Test Voltage: DC 3.7V Test Engineer: Lily. zhang Note: For a more detailed features description, please refer to the report TBR-C-202508-0228-4 The report only show the worst case data. Shenzhen Toby Technology Co., Ltd. Http://www.tobylab.cn Add：1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China. Report No.: TBR-C-202508-0228-4 Page: 2 of 75 FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 Contents 1. Dwell Time ..................................................................................................................................................................................... 3 2. Duty Cycle ..................................................................................................................................................................................... 9 3. Maximum Conducted Output Power .......................................................................................................................................... 15 4. -20dB Bandwidth ......................................................................................................................................................................... 27 5. Occupied Channel Bandwidth .................................................................................................................................................... 33 6. Band Edge ................................................................................................................................................................................... 39 7. Band Edge(Hopping) ................................................................................................................................................................... 46 8. Conducted RF Spurious Emission ............................................................................................................................................. 53 9. Restrict Band ............................................................................................................................................................................... 63 10. Carrier Frequencies Separation ........................................................................................................................................ 70 11. Number of Hopping Channel ............................................................................................................................................. 73 Shenzhen Toby Technology Co., Ltd. Http://www.tobylab.cn Add：1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China. Report No.: TBR-C-202508-0228-4 Page: 3 of 75 FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 1. Dwell Time Condition Mode Frequency (MHz) Antenna Pulse Time (ms) Total Dwell Time (ms) Period Time (ms) Limit (ms) Verdict NVNT 1-DH1 2441 Ant1 0.383 122.56 31600 400 Pass NVNT 1-DH3 2441 Ant1 1.639 262.24 31600 400 Pass NVNT 1-DH5 2441 Ant1 2.886 307.84 31600 400 Pass NVNT 2-DH1 2441 Ant1 0.391 125.12 31600 400 Pass NVNT 2-DH3 2441 Ant1 1.633 261.28 31600 400 Pass NVNT 2-DH5 2441 Ant1 2.891 308.373 31600 400 Pass NVNT 3-DH1 2441 Ant1 0.392 125.44 31600 400 Pass NVNT 3-DH3 2441 Ant1 1.641 262.56 31600 400 Pass NVNT 3-DH5 2441 Ant1 2.892 308.48 31600 400 Pass Both headphones were tested, and only the worst mode was recorded.(Left Earphone) Shenzhen Toby Technology Co., Ltd. Http://www.tobylab.cn Add：1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China. Report No.: TBR-C-202508-0228-4 Page: 4 of 75 FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 Test Graphs Dwell NVNT 1-DH1 2441MHz Ant1 Dwell NVNT 1-DH3 2441MHz Ant1 Shenzhen Toby Technology Co., Ltd. Http://www.tobylab.cn Add：1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China. Report No.: TBR-C-202508-0228-4 Page: 5 of 75 FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 Dwell NVNT 1-DH5 2441MHz Ant1 Dwell NVNT 2-DH1 2441MHz Ant1 Shenzhen Toby Technology Co., Ltd. Http://www.tobylab.cn Add：1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China. Report No.: TBR-C-202508-0228-4 Page: 6 of 75 FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 Dwell NVNT 2-DH3 2441MHz Ant1 Dwell NVNT 2-DH5 2441MHz Ant1 Shenzhen Toby Technology Co., Ltd. Http://www.tobylab.cn Add：1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China. Report No.: TBR-C-202508-0228-4 Page: 7 of 75 FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 Dwell NVNT 3-DH1 2441MHz Ant1 Dwell NVNT 3-DH3 2441MHz Ant1 Shenzhen Toby Technology Co., Ltd. Http://www.tobylab.cn Add：1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China. Report No.: TBR-C-202508-0228-4 Page: 8 of 75 FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 Dwell NVNT 3-DH5 2441MHz Ant1 Shenzhen Toby Technology Co., Ltd. Http://www.tobylab.cn Add：1/F.,Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China. Report No.: TBR-C-202508-0228-4 Page: 9 of 75 FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 2. Duty Cycle Condition Mode Frequency (MHz) Antenna Duty Cycle (%) Correction Factor (dB) 1/T (kHz) NVNT 1-DH5 2402 Ant1 29.82 5.25 0.35 NVNT 1-DH5 2441 Ant1 29.82 5.25 0.35 NVNT 1-DH5 2480 Ant1 29.82 5.25 0.35 NVNT 2-DH5 2402 Ant1 29.82 5…

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Shenzhen Toby Technology Co., Ltd. Report No.: TBR-C-202508-0228-4 Page: 1 of 43 TB-RF-074-1.0 1/F., Building 6, Rundongsheng Industrial Zone, Longzhu, Xixiang, Bao'an District, Shenzhen, Guangdong, China Tel: +86 75526509301 Fax: +86 75526509195 RF Test Report FCC ID: 2BRSR-CERAMICSULTRA Report No. : TBR-C-202508-0228-4 Applicant : Chengdu Miaomiao Wangwang Technology Co., Ltd. Equipment Under Test (EUT) EUT Name : Wireless headphones Model No. : CERAMICS Ultra Series Model No. : CERAMICS Brand Name : ROSESELSA Sample ID : HC-C-202508-0228-01-01-1#&HC-C-202508-0228-01-01-2# Receipt Date : 2025-11-26 Test Date : 2025-11-26 to 2025-12-03 Issue Date : 2025-12-03 Standards : FCC Part 15 Subpart C 15.247 Test Method : ANSI C63.10:2020+Cor.1:2023 KDB 558074 D01 15.247 Meas Guidance v05r02 Conclusions : PASS In the configuration tested, the EUT complied with the standards specified above. Tested By : Lily. zhang Reviewed By : Wade. Lv Approved By : Ivan Su This report details the results of the testing carried out on one sample. The results contained in this test report do not relate to other samples of the same product. The manufacturer should ensure that all products in series production are in conformity with the product sample detailed in the report. Report No.: TBR-C-202508-0228-4 Page: 2 of 43 TB-RF-074-1.0 Contents CONTENTS ............................................................................................................................................. 2 1. GENERAL INFORMATION ABOUT EUT.............................................................................. 6 1.1 Client Information ................................................................................................................. 6 1.2 General Description of EUT (Equipment Under Test) ................................................... 6 1.3 Block Diagram Showing the Configuration of System Tested ...................................... 8 1.4 Description of Support Units .............................................................................................. 8 1.5 Description of Test Mode .................................................................................................... 9 1.6 Description of Test Software Setting .............................................................................. 10 1.7 Measurement Uncertainty ................................................................................................ 11 1.8 Test Facility ......................................................................................................................... 12 2. TEST SUMMARY ..................................................................................................................... 13 3. TEST SOFTWARE ................................................................................................................... 13 4. TEST EQUIPMENT AND TEST SITE ................................................................................... 14 5. CONDUCTED EMISSION ....................................................................................................... 16 5.1 Test Standard and Limit .................................................................................................... 16 5.2 Test Setup ........................................................................................................................... 16 5.3 Test Procedure ................................................................................................................... 16 5.4 Deviation From Test Standard ......................................................................................... 17 5.5 EUT Operating Mode ........................................................................................................ 17 5.6 Test Data ............................................................................................................................. 17 6. RADIATED AND CONDUCTED UNWANTED EMISSIONS ............................................ 18 6.1 Test Standard and Limit .................................................................................................... 18 6.2 Test Setup ........................................................................................................................... 20 6.3 Test Procedure ................................................................................................................... 21 6.4 Deviation From Test Standard ......................................................................................... 22 6.5 EUT Operating Mode ........................................................................................................ 22 6.6 Test Data ............................................................................................................................. 22 7. RESTRICTED BANDS AND BAND EDGE REQUIREMENT .......................................... 23 7.1 Test Standard and Limit .................................................................................................... 23 7.2 Test Setup ........................................................................................................................... 23 7.3 Test Procedure ................................................................................................................... 24 7.4 Deviation From Test Standard ......................................................................................... 25 Report No.: TBR-C-202508-0228-4 Page: 3 of 43 TB-RF-074-1.0 7.5 EUT Operating Mode ........................................................................................................ 25 7.6 Test Data ............................................................................................................................. 25 8. 99% OCCUPIED AND 20DB BANDWIDTH ........................................................................ 26 8.1 Test Standard and Limit ..................................................…

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FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 Appendix V EUT Test Photographs Photo of Setup for Conducted Emission Photo of Setup for Radiated Emission (Below 1 GHz) FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 Photo of Setup for Radiated Emission (Above 1 GHz) Photo of Setup for Radiated Emission (Above 1 GHz) FCC ID: 2BRSR-CERAMICSULTRA TB-RF-074-1.0 Photo of Setup for RF Conducted -----END OF THE REPORT-----