2A4TBS5True Wireless Stereo Earbuds

T rue Wireless Stereo Earbuds Srhythm SoulMate Series (S�) U ser Manual Find the rhythm of your soul What's in the Box �� Precautions for Battery EnglishEnglish S� is powered by a built-in rechargeable lithium battery. Please charge S� over � hours before using it for your first time. �. Only the attached Type-C cable can be used for charging battery. Incorrect charging may damage batteries and earbuds. �. Do not attempt to open rechargeable batteries or battery packs because that may break products due to the precise structure.There are also no usable parts in it. �. Rechargeable batteries only can be recharged by adults.Keep the battery out of reach of children.If children swallowed it,please take them to the hospital immediately. �. Keep the battery away from the fire.Do not throw the battery into the fire,otherwise it may explode.Batteries may also explode if being damaged.Please handle and disposal it according to your local conditions and regulations. You could replace silicon eartips to be the best suitable size for your ears. (S/M/L size for your choice) Product Dimensions Earbuds Charging Box Special earplugs on S� earbuds give you more stable wearing, not easy to fall out. Please follow these steps to wear. �.Gently insert the earplugs to ensure comfortable wearing. �.Rotate and adjust the earplugs to the correct position. More stable wearing �� True Wireless Stereo Earbuds Srhythm SoulMate Series (S�) Find the rhythm of your soul �� EnglishEnglish Parameters Load Impedance��Ω ��Hz~��KHz ≥� Hours(Middle Sound) >-��dB IPX� V�.� ���dB+/-�dB AAC,SBC,A�DP,HFP,HSP,AVRCP,etc. <� Hours Earphone �.�V Earphone ��mAh ���mAh �g Per Unit, ��g for Charging Box Frequency Range Playtime Maximum Noise Deduction Water Proof Level Bluetooth Version Sensitivity Bluetooth Support Charging Box Charging Time Operating Voltage Charging Box Batter Weight ��m/��ft（Without obstacles）Bluetooth Range ��mAh Per Unit Earbud Battery Φ��mmDriver Diameter AI Dual Ｍic ENC Ｎoise CancellingANC+ENC Wireless Noise Cancelling Earbuds S�. Your earbuds come with multiple pairs of eartips, Medium size eartips are pre-installed. * Above data are all from the laboratory and for reference only. Tip:The earbuds will automatically power off after �� minutes if no device is connected. Remove the earbuds from the charging case. Wait �� seconds to let earbuds pair with itself automatically. Power On/Off ON OFF M S L �� �� Replace Silicone Earplugs Need to use a certain amount of force to remove the earplugs �� EnglishEnglish Open the charging case, the earbuds will automatically enter the Bluetooth pairing mode. Select “Srhythm S�” on your device’s Bluetooth list to connect. When connected successfully, you can hear “connected” voice prompt. Tap the left touchpad twice, you will hear the "ANC on" voice promp. ANC mode(Active Noise Cancelling) Tap left or right touchpad � times to activate voice dialing function (compatible with iPhone Siri and selected Android voice dialing software). Voice Assistance Tap the left touchpad twice to switch between "ANC on", "ANC off" and "Transparency mode". Transparency mode ENC is automatically activated when you're on a call or using your voice assistant so that the receiver has no problems understanding you regardless of the ambient noise. ENC mode(Environmental Noise Cancelling) When Bluetooth connected, you can use either one of the earbuds by placing the other one into the charging case(ANC function is not available in Mono mode). Mono mode Bluetooth Pairing Srhythm S5 ******** L ×� L ×� LR ×� �� EnglishEnglish Put the earbuds into charging box, keep the charging box open and long press the reset button on the charging box for �� seconds. The green light will flash for � seconds, and then turn off. Then the reset is done. Both left and right earbuds have touch control function. Reset Multi-function Touchpad ��s Play/Pause Mono Next track Previous track Switch ambient sound modes: ANC on/ANC off/Transparency Press twice（R） Long press for � seconds（R） Long press for � seconds（L） Press twice（L） Answer a call End a call Reject a call Press twice（L/R） Press twice（L/R） Long press for � seconds（L/R） Play/Pause Next track Press twice（L/R） Long press for � seconds（L/R） Answer a call End a call Reject a call Press twice（L/R） Press twice（L/R） Long press for � seconds（L/R） Charge the Charging Box Connect the attached USB Type-C cable to the USB interface (charging wall or charger is not provided by Srhythm) and charge the Charging Box under �.�V. It takes �-� hours to fully charge earbuds and charging box. LR LR / ��� EnglishEnglish NO TE Do no t handle the earbuds roughly. Do not press them with heavy objects. Keep away from heat and humidity. For best performance, keep away from Wi-Fi routers and other high-frequency transmitting devices. Please use the earbuds within the effective distance of �� meters. There should be no physical obstruction (such as a wall, etc.) between the Bluetooth device and the earbuds. The earbuds can be paired with any device that supports Bluetooth. �.T he packaging contains small parts that can endanger children. Therefore, it should be kept out of the reach of children. Swallowing plastic bags can cause suffocation. �. Do not attempt to disassemble the product or insert any object into the product by yourself, otherwise it may cause a short circuit, which may lead to fire or electric shock. �. Customer shall not replace or repair any component. Only authorized dealers or repair service center can open finished products. If any part of the product needs to be replaced for any reason (including normal wear and tear and damage or cracking), please contact the vendor. �. Avoid rain, dampness or contact with other liquids. �. If the product is overheating, falling or damaged, or the product falls into a medium liquid, please stop using it. �. Using headphones while driving may be restricted by local laws. Please consult the local authority. Be careful when using this produ…

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ShenzhenSrhythmIndustryCo.,Ltd. FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date: August1,2023 FCCID:2A4TBS5 Ref.#1: AttestationStatementsPart2.911(d)(5)(i)Filing ShenzhenSrhythmIndustryCo.,Ltd.certifiesthattheequipmentforwhichauthorizationis soughtisnot“covered”equipmentprohibitedfromreceivinganequipmentauthorization pursuanttosection2.903oftheFCCrules. Ref.#2: AttestationStatementsPart2.911(d)(5)(ii)Filing ShenzhenSrhythmIndustryCo.,Ltd.certifiesthat,asofthedateofthefilingofthe application,theapplicantisnotidentifiedontheCoveredListasanentityproducing “covered”equipment. Applicant: Shenzhen Srhythm Industry Co., Ltd。 Address:1602 Zhongan Building, Guangchang Road Wenjing Community, Buji St., Longgang Dist. ContactPerson:JiaoPeng Tel.:18924658087 Email:[email protected] Sincerely, Signature:

Effective Date: April 2, 2020QSF 7.6.4-8 – Agent Authorization Letter TemplatePage 1 of 1 Revision Date:Revision: 0 Shenzhen Srhythm Industry Co., Ltd. Date ： 6/25/2023 Product Model Number:S5 FCC ID ： 2A4TBS5 To whom it may concern, Re: Product Certification Representative Authorization Letter We authorize QAI Laboratories Ltd. 3980 North Fraser Way, Burnaby B.C. Canada V5J 5K5 to act on our behalf on all matters concerning the above named equipment. This shall include the following: Testing Approval applications and procedures We declare thatORGANIZATION. is allowed to forward all information related to the approval project to the applied certification body and to the notification entities and to discuss any issues concerning the approval application. Any and all acts carried out byORGANIZATION. on our behalf shall have the same effect as acts of our own. By: Jiao Peng Contact Listed on FCC Wesbite Title: CEO Email: [email protected] On behalf of: Shenzhen Srhythm Industry Co., Ltd.

SymbolsLWTA Dimensions1.60±0.200.80±0.200.80±0.200.30±0.10 NumberTerminal Name ① INPUT ② NC Dimensions（Unit：mm） L w ① ② T ( Side View ) ( Bottom View ) ( Top View ) A Features 1.Surface Mounted Devices with a small dimension of 1.6 x 0.8 x 0.8 mm meet future miniaturization trend. 2,Embedded and LTCC (low temperature co-fired ceramic) technology is able to integrate with system design as well as beatifying the housing of final product. 3.High stability and low tolerance. Applications 1.Bluetooth 2.Wireless LAN 3.ISM band 2.4GHz wireless applications P/N: H LX16 0 8 0 8 D 0 6 地址：深圳市宝安区西乡街道共乐社区铁仔路九方广场2栋1905 TEL: 0755-23591525, FAX: 0755-23591525 Evaluation Board and Matching Circuits P/N: H LX16 0 8 0 8 D 0 6 地址：深圳市宝安区西乡街道共乐社区铁仔路九方广场2栋1905 TEL: 0755-23591525, FAX: 0755-23591525 P/N: H LX16 0 8 0 8 D 0 6 S11-Parameter Frequency(MHz)2400245024802500 VSWR1.561.161.481.79 地址：深圳市宝安区西乡街道共乐社区铁仔路九方广场2栋1905 TEL: 0755-23591525, FAX: 0755-23591525 Radiation Pattern coordinates： Y-Z Plane X-Z Plane P/N: H LX16 0 8 0 8 D 0 6 地址：深圳市宝安区西乡街道共乐社区铁仔路九方广场2栋1905 TEL: 0755-23591525, FAX: 0755-23591525 X-Y Plane Frequency2400MHz2450MHz2490MHz Avg. gain1.101.330.45 Peak gain2.52.62.5 Efficiency55%57%53% P/N: H L X16 0 8 0 8 D 0 6 地址：深圳市宝安区西乡街道共乐社区铁仔路九方广场2栋1905 TEL: 0755-23591525, FAX: 0755-23591525 Temperature：40±2°C Humidity：90~95%RH Duration：500h Recovery conditions：Room temperature Recovery Time：24h (Class1) or 48h (Class2) Solderability At least 95% of the terminal electrode is covered by new solder.Preheating conditions:80 to 120°C; 10~30s. SolderTemperature:235± 5°C Duration:2 ±0.5s , SolderTemperature:245±5°C Duration:2±0.5s Optimum Solder Amount for Reflow Soldering Operating Temperature Temperature Relative Humidity Moisture Proof -25°C~+85°C 5~40°C 20~70% Too much solderCracks tend to occur due to large stress. Not enough solder Weak holding force may cause bad connection between the capacitor and PCB. Recommended Soldering amounts The optimal solder fillet amounts for re-flow soldering 天线厚度 以下 The optimal solder fillet amounts for wave soldering P/N: H LX16 0 8 0 8 D 0 6 Dependability Test Test Temperature: 25°C±3°C 地址：深圳市宝安区西乡街道共乐社区铁仔路九方广场2栋1905 TEL: 0755-23591525, FAX: 0755-23591525 While in preheating,please keep the temperature difference between soldering temperature and surface temperature of chips as: T≤150°C. P/N: H LX16 0 8 0 8 D 0 6 地址：深圳市宝安区西乡街道共乐社区铁仔路九方广场2栋1905 TEL: 0755-23591525, FAX: 0755-23591525 Dimensions of paper taping for 0603types Reel（4000 pcs/Reel） Storage Period The guaranteed period for solderability is 6 months (Under deliver package condition).Temperature5~40°C /Relative Humidity20~70% P/N: H LX16 0 8 0 8 D 0 6 Unit：mm 地址：深圳市宝安区西乡街道共乐社区铁仔路九方广场2栋1905 TEL: 0755-23591525, FAX: 0755-23591525

Shenzhen Srhythm Industry Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: August 1, 2023 Subject; Request for Confidentiality FCC ID: 2A4TBS5 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Jiao Peng Title: CEO

Shenzhen Srhythm Industry Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: August 1, 2023 Subject; Request for Confidentiality FCC ID: 2A4TBS5 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Jiao Peng Title: CEO

Page 1 of 7 Report No.: LGT23F041 Appendix - External Photographs of EUT Constructional Details Model: S5 Photo 1 Photo 2 Page 2 of 7 Report No.: LGT23F041 Photo 3 Photo 4 Page 3 of 7 Report No.: LGT23F041 Photo 5 Photo 6 Page 4 of 7 Report No.: LGT23F041 Photo 7 Photo 8 Page 5 of 7 Report No.: LGT23F041 Photo 9 Photo 10 Page 6 of 7 Report No.: LGT23F041 Photo 11 Photo 12 Page 7 of 7 Report No.: LGT23F041 Photo 13 Photo 14

Label Model:S5 FCC ID:2A4TBS5 IC:28241-S5

Page 1 of 4 Report No.: LGT23F041 Appendix - Internal Photographs of EUT Constructional Details Model: S5 Photo 1 Photo 2 Page 2 of 4 Report No.: LGT23F041 Photo 3 Photo 4 Page 3 of 4 Report No.: LGT23F041 Photo 5 Photo 6 ANT 1 Page 4 of 4 Report No.: LGT23F041 Photo 7

FCC ID: 2A4TBS5 RF EXPOSURE EVALUATION METHOD- KDB 447498 D01V06 SAR Test Exclusion Thresholds for 100 MHz – 6 GHz and ≤ 50 mm Approximate SAR Test Exclusion Power Thresholds at Selected Frequencies and Test Separation Distances are illustrated in the following Table. 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 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. FCC ID: 2A4TBS5 BT The Worst Case Mode 2402-2480MHz Detector PEAK GFSK 1±1dBm π/4-DQPSK -1±1dBm 8DPSK -2±1dBm BLE 1M GFSK 1±1dBm BLE 2M GFSK 1±1dBm Remark:The worst case gain of the antenna is 2.6dBi. 2.6dBi logarithmic terms convert to numeric result is nearly 1.82 Bluetooth Frequency (GHz) Tune up Power (dBm) Tune up Power (mW) Result Limit 2.48 2 1.584893192 0.4992 3 2.48 0 1 0.3150 3 2.48 -1 0.794328235 0.2502 3 Threshold at which no SAR required is 0.4992≤ 3.0 for 1-g SAR, Separation distance is 5mm. BLE Frequency (GHz) Tune up Power (dBm) Tune up Power (mW) Result Limit 2.48 2 1.585 0.4992 3 2.48 2 1.585 0.4992 3 Threshold at which no SAR required is 0.4992≤ 3.0 for 1-g SAR, Separation distance is 5mm.

The test report is effective only with both signature and specialized stamp. This report shall not be reproduced except in full without the written approval of the Laboratory. The results in this report only apply to the tested sample. Shenzhen LGT Test Service Co., Ltd. Tel: 0755-89668180 E-mail:[email protected] Web: www.lgt-cert.com Room 205, Building 13, Zone B, Zhenxiong Industrial Park, No.177, Renmin West Road, Jinsha, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China RF TEST REPORT Product Name: True Wireless Stereo Earbuds Model Name: S5 FCC ID: 2A4TBS5 IC: 28241-S5 Issued For : Shenzhen Srhythm Industry Co.,Ltd. 1602 Zhongan Building, Guangchang Road, Wenjing Community, Buji Street, Longgang Distruct, Shenzhen, Guangdong 518000, China Issued By : Shenzhen LGT Test Service Co., Ltd. Room 205, Building 13, Zone B, Zhenxiong Industrial Park, No.177, Renmin West Road, Jinsha, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China Report Number: LGT23F041RF01 Sample Received Date: Jun. 21, 2023 Date of Test: Jun. 21, 2023 – Aug. 01, 2023 Date of Issue: Aug. 01, 2023 Report No.: LGT23F041RF01 Page 2 of 82 TEST REPORT CERTIFICATION Applicant: Shenzhen Srhythm Industry Co.,Ltd. Address: 1602 Zhongan Building, Guangchang Road, Wenjing Community, Buji Street, Longgang Distruct, Shenzhen, Guangdong 518000, China Manufacturer: Shenzhen Srhythm Industry Co.,Ltd. Address: 1602 Zhongan Building, Guangchang Road, Wenjing Community, Buji Street, Longgang Distruct, Shenzhen, Guangdong 518000, China Product Name: True Wireless Stereo Earbuds Trademark: Srhythm S5 Model Name: S5 Sample Number: LGT2306073-1 APPLICABLE STANDARDS STANDARD TEST RESULTS FCC Part 15.247, Subpart C RSS-247 Issue 2, February 2017 RSS-Gen Issue 5, March 2019 ANSI C63.10-2013 PASS Prepared by: Approved by: Zane Shan Vita Li Engineer Technical Director Report No.: LGT23F041RF01 Page 3 of 82 Table of Contents Page 1. SUMMARY OF TEST RESULTS 6 1.1 TEST FACTORY 7 1.2 MEASUREMENT UNCERTAINTY 7 2. GENERAL INFORMATION 8 2.1 GENERAL DESCRIPTION OF THE EUT 8 2.2 DESCRIPTION OF THE TEST MODES 10 2.3 FREQUENCY HOPPING SYSTEM REQUIREMENTS 10 2.4 TABLE OF PARAMETERS OF TEST SOFTWARE SETTING 12 2.5 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS 12 2.6 EQUIPMENTS LIST 13 3. EMC EMISSION TEST 14 3.1 CONDUCTED EMISSION MEASUREMENT 14 3.2 RADIATED EMISSION MEASUREMENT 18 4. CONDUCTED SPURIOUS & BAND EDGE EMISSION 30 4.1 LIMIT 30 4.2 TEST PROCEDURE 30 4.3 TEST SETUP 31 4.4 EUT OPERATION CONDITIONS 31 4.5 TEST RESULTS 31 5. NUMBER OF HOPPING CHANNEL 32 5.1 LIMIT 32 5.2 TEST PROCEDURE 32 5.3 TEST SETUP 32 5.4 EUT OPERATION CONDITIONS 32 5.5 TEST RESULTS 32 6. AVERAGE TIME OF OCCUPANCY 33 6.1 LIMIT 33 6.2 TEST PROCEDURE 33 6.3 TEST SETUP 33 6.4 EUT OPERATION CONDITIONS 33 6.5 TEST RESULTS 33 7. HOPPING CHANNEL SEPARATION MEASUREMEN 34 7.1 LIMIT 34 7.2 TEST PROCEDURE 34 Report No.: LGT23F041RF01 Page 4 of 82 Table of Contents Page 7.3 TEST SETUP 34 7.4 EUT OPERATION CONDITIONS 34 7.5 TEST RESULTS 34 8. BANDWIDTH TEST 35 8.1 LIMIT 35 8.2 TEST PROCEDURE 35 8.3 TEST SETUP 35 8.4 EUT OPERATION CONDITIONS 35 8.5 TEST RESULTS 35 9. OUTPUT POWER TEST 36 9.1 LIMIT 36 9.2 TEST PROCEDURE 36 9.3 TEST SETUP 36 9.4 EUT OPERATION CONDITIONS 36 9.5 TEST RESULTS 36 10. ANTENNA REQUIREMENT 37 10.1 STANDARD REQUIREMENT 37 10.2 EUT ANTENNA 37 11. FREQUENCY STABILITY 38 11.1 LIMITS OF FREQUENCY STABILITY MEASUREMENT 38 11.2 TEST PROCEDURE 38 11.3 TEST RESULT 38 APPENDIX I:TEST RESULTS 39 DWELL TIME 39 DUTY CYCLE 46 MAXIMUM PEAK CONDUCTED OUTPUT POWER AND EIRP 50 -20DB BANDWIDTH 51 OCCUPIED CHANNEL BANDWIDTH 55 CARRIER FREQUENCIES SEPARATION 59 BAND EDGE 63 BAND EDGE(HOPPING) 68 CONDUCTED RF SPURIOUS EMISSION 73 NUMBER OF HOPPING CHANNEL 80 FREQUENCY STABILITY 82 Report No.: LGT23F041RF01 Page 5 of 82 Revision History Rev. Issue Date Contents 00 Aug. 01, 2023 Initial Issue Report No.: LGT23F041RF01 Page 6 of 82 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: KDB 558074 D01 15.247 Meas Guidance v05r02. FCC Part 15.247, Subpart C RSS-247 Issue 2 Standard Section Test Item Judgment Remark 15.207 RSS-Gen (8.8) Conducted Emission PASS -- 15.247(a)(1) RSS-247 (5.1) Hopping Channel Separation PASS -- 15.247(a)(1)&(b)(1) RSS-247 (5.1) Output Power PASS -- 15.209 RSS-Gen (8.9&8.10) Radiated Spurious Emission PASS -- 15.247(d) RSS-247 (5.5) Conducted Spurious & Band Edge Emission PASS -- 15.247(a)(1)(iii) RSS-247 (5.1) Number of Hopping Frequency PASS -- 15.247(a)(1)(iii) RSS-247 (5.1) Dwell Time PASS -- 15.247(a)(1) RSS-247 (5.1) Bandwidth PASS -- 15.205 RSS-Gen (8.9&8.10) Restricted bands of operation PASS -- Part 15.247(d)/part 15.209(a) RSS-247 (5.5) RSS-Gen (8.9&8.10) Band Edge Emission PASS -- 15.203 RSS-Gen (6.8) Antenna Requirement PASS -- RSS-Gen (6.11&8.11) Frequency Stability PASS -- NOTE: (1) ‘N/A’ denotes test is not applicable in this Test Report. (2) All tests are according to ANSI C63.10-2013. Report No.: LGT23F041RF01 Page 7 of 82 1.1 TEST FACTORY Company Name: Shenzhen LGT Test Service Co., Ltd. Address: Room 205, Building 13, Zone B, Zhenxiong Industrial Park, No.177, Renmin West Road, Jinsha, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China Accreditation Certificate A2LA Certificate No.: 6727.01 FCC Registration No.: 746540 CAB ID: CN0136 1.2 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 %. No. Item Uncertainty 1 RF output power, conducted ±0.68dB 2 Unwanted Emissions, conducted ±2.988dB 3 All emissions, radiated 9K-30MHz ±2.84dB 4 All emissions, radiated 30M-1GHz ±4.39dB 5 All emissions, radiated 1G-6GHz ±5.10dB 6 All emissions, radiated>6G ±5.48dB 7 Conducted Emission (9KHz-150KHz) ±2.79dB 8 Conducted Emission (150KHz-30MHz) ±2.80dB Note: The measurement uncertainty is not included in the test result. Report N…

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The test report is effective only with both signature and specialized stamp. This report shall not be reproduced except in full without the written approval of the Laboratory. The results in this report only apply to the tested sample. Shenzhen LGT Test Service Co., Ltd. Tel: 0755-89668180 E-mail:[email protected] Web: www.lgt-cert.com Room 205, Building 13, Zone B, Zhenxiong Industrial Park, No.177, Renmin West Road, Jinsha, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China RF TEST REPORT Product Name: True Wireless Stereo Earbuds Model Name: S5 FCC ID: 2A4TBS5 IC: 28241-S5 Issued For : Shenzhen Srhythm Industry Co.,Ltd. 1602 Zhongan Building, Guangchang Road, Wenjing Community, Buji Street, Longgang Distruct, Shenzhen, Guangdong 518000, China Issued By : Shenzhen LGT Test Service Co., Ltd. Room 205, Building 13, Zone B, Zhenxiong Industrial Park, No.177, Renmin West Road, Jinsha, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China Report Number: LGT23F041RF01 Sample Received Date: Jun. 21, 2023 Date of Test: Jun. 21, 2023 – Aug. 01, 2023 Date of Issue: Aug. 01, 2023 Report No.: LGT23F041RF01 Page 2 of 82 TEST REPORT CERTIFICATION Applicant: Shenzhen Srhythm Industry Co.,Ltd. Address: 1602 Zhongan Building, Guangchang Road, Wenjing Community, Buji Street, Longgang Distruct, Shenzhen, Guangdong 518000, China Manufacturer: Shenzhen Srhythm Industry Co.,Ltd. Address: 1602 Zhongan Building, Guangchang Road, Wenjing Community, Buji Street, Longgang Distruct, Shenzhen, Guangdong 518000, China Product Name: True Wireless Stereo Earbuds Trademark: Srhythm S5 Model Name: S5 Sample Number: LGT2306073-1 APPLICABLE STANDARDS STANDARD TEST RESULTS FCC Part 15.247, Subpart C RSS-247 Issue 2, February 2017 RSS-Gen Issue 5, March 2019 ANSI C63.10-2013 PASS Prepared by: Approved by: Zane Shan Vita Li Engineer Technical Director Report No.: LGT23F041RF01 Page 3 of 82 Table of Contents Page 1. SUMMARY OF TEST RESULTS 6 1.1 TEST FACTORY 7 1.2 MEASUREMENT UNCERTAINTY 7 2. GENERAL INFORMATION 8 2.1 GENERAL DESCRIPTION OF THE EUT 8 2.2 DESCRIPTION OF THE TEST MODES 10 2.3 FREQUENCY HOPPING SYSTEM REQUIREMENTS 10 2.4 TABLE OF PARAMETERS OF TEST SOFTWARE SETTING 12 2.5 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS 12 2.6 EQUIPMENTS LIST 13 3. EMC EMISSION TEST 14 3.1 CONDUCTED EMISSION MEASUREMENT 14 3.2 RADIATED EMISSION MEASUREMENT 18 4. CONDUCTED SPURIOUS & BAND EDGE EMISSION 30 4.1 LIMIT 30 4.2 TEST PROCEDURE 30 4.3 TEST SETUP 31 4.4 EUT OPERATION CONDITIONS 31 4.5 TEST RESULTS 31 5. NUMBER OF HOPPING CHANNEL 32 5.1 LIMIT 32 5.2 TEST PROCEDURE 32 5.3 TEST SETUP 32 5.4 EUT OPERATION CONDITIONS 32 5.5 TEST RESULTS 32 6. AVERAGE TIME OF OCCUPANCY 33 6.1 LIMIT 33 6.2 TEST PROCEDURE 33 6.3 TEST SETUP 33 6.4 EUT OPERATION CONDITIONS 33 6.5 TEST RESULTS 33 7. HOPPING CHANNEL SEPARATION MEASUREMEN 34 7.1 LIMIT 34 7.2 TEST PROCEDURE 34 Report No.: LGT23F041RF01 Page 4 of 82 Table of Contents Page 7.3 TEST SETUP 34 7.4 EUT OPERATION CONDITIONS 34 7.5 TEST RESULTS 34 8. BANDWIDTH TEST 35 8.1 LIMIT 35 8.2 TEST PROCEDURE 35 8.3 TEST SETUP 35 8.4 EUT OPERATION CONDITIONS 35 8.5 TEST RESULTS 35 9. OUTPUT POWER TEST 36 9.1 LIMIT 36 9.2 TEST PROCEDURE 36 9.3 TEST SETUP 36 9.4 EUT OPERATION CONDITIONS 36 9.5 TEST RESULTS 36 10. ANTENNA REQUIREMENT 37 10.1 STANDARD REQUIREMENT 37 10.2 EUT ANTENNA 37 11. FREQUENCY STABILITY 38 11.1 LIMITS OF FREQUENCY STABILITY MEASUREMENT 38 11.2 TEST PROCEDURE 38 11.3 TEST RESULT 38 APPENDIX I:TEST RESULTS 39 DWELL TIME 39 DUTY CYCLE 46 MAXIMUM PEAK CONDUCTED OUTPUT POWER AND EIRP 50 -20DB BANDWIDTH 51 OCCUPIED CHANNEL BANDWIDTH 55 CARRIER FREQUENCIES SEPARATION 59 BAND EDGE 63 BAND EDGE(HOPPING) 68 CONDUCTED RF SPURIOUS EMISSION 73 NUMBER OF HOPPING CHANNEL 80 FREQUENCY STABILITY 82 Report No.: LGT23F041RF01 Page 5 of 82 Revision History Rev. Issue Date Contents 00 Aug. 01, 2023 Initial Issue Report No.: LGT23F041RF01 Page 6 of 82 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: KDB 558074 D01 15.247 Meas Guidance v05r02. FCC Part 15.247, Subpart C RSS-247 Issue 2 Standard Section Test Item Judgment Remark 15.207 RSS-Gen (8.8) Conducted Emission PASS -- 15.247(a)(1) RSS-247 (5.1) Hopping Channel Separation PASS -- 15.247(a)(1)&(b)(1) RSS-247 (5.1) Output Power PASS -- 15.209 RSS-Gen (8.9&8.10) Radiated Spurious Emission PASS -- 15.247(d) RSS-247 (5.5) Conducted Spurious & Band Edge Emission PASS -- 15.247(a)(1)(iii) RSS-247 (5.1) Number of Hopping Frequency PASS -- 15.247(a)(1)(iii) RSS-247 (5.1) Dwell Time PASS -- 15.247(a)(1) RSS-247 (5.1) Bandwidth PASS -- 15.205 RSS-Gen (8.9&8.10) Restricted bands of operation PASS -- Part 15.247(d)/part 15.209(a) RSS-247 (5.5) RSS-Gen (8.9&8.10) Band Edge Emission PASS -- 15.203 RSS-Gen (6.8) Antenna Requirement PASS -- RSS-Gen (6.11&8.11) Frequency Stability PASS -- NOTE: (1) ‘N/A’ denotes test is not applicable in this Test Report. (2) All tests are according to ANSI C63.10-2013. Report No.: LGT23F041RF01 Page 7 of 82 1.1 TEST FACTORY Company Name: Shenzhen LGT Test Service Co., Ltd. Address: Room 205, Building 13, Zone B, Zhenxiong Industrial Park, No.177, Renmin West Road, Jinsha, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China Accreditation Certificate A2LA Certificate No.: 6727.01 FCC Registration No.: 746540 CAB ID: CN0136 1.2 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 %. No. Item Uncertainty 1 RF output power, conducted ±0.68dB 2 Unwanted Emissions, conducted ±2.988dB 3 All emissions, radiated 9K-30MHz ±2.84dB 4 All emissions, radiated 30M-1GHz ±4.39dB 5 All emissions, radiated 1G-6GHz ±5.10dB 6 All emissions, radiated>6G ±5.48dB 7 Conducted Emission (9KHz-150KHz) ±2.79dB 8 Conducted Emission (150KHz-30MHz) ±2.80dB Note: The measurement uncertainty is not included in the test result. Report N…

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Page 1 of 2 Report No.: LGT23F041 Appendix - Test Setup photos Set-up for Radiated Spurious Emission, Below 1GHz Set-up for Radiated Spurious Emission, Above 1GHz Page 2 of 2 Report No.: LGT23F041 Set-up for Conducted Emission Note：The right Stereo Earbuds was used for the test