2AMBHR220110WIRED HEADSET

Relay, Inc. Covered Equipment Certification Attestation Letter 2024-07-26 Nemko North America, Inc. 303 River Road Ottawa K1V 1H2 Canada ATTN.: Reviewing Engineer FCC ID: 2AMBHR220110 Relay Inc. (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Note: If the equipment for which the applicant seeks authorization is produced by any of the entities identified on the current Covered List, the applicant should include an explanation on why the equipment is not “covered” equipment. Relay Inc. (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. Signed: Printed name: Michael DiVerde Title: Senior Director Company Name: Relay Inc. Address: 4200 Six Forks Rd, Suite 1800, Raleigh, NC 27609, United States Phone: +1(815)529-2004 E-Mail: [email protected] Date: 2024-07-26

Relay, Inc. 2024-07-26 Nemko North America, Inc. 303 River Road Ottawa, Ontario, Canada K1V 1H2 AUTHORITY TO ACT AS AGENT - FCC On our behalf, I appoint Damon Hu, Guangdong Dongdian Testing Service Co.,Ltd.( Unit 2, Building1, No.17, Zongbu 2nd Road, Songshan Lake Park, Dongguan, Guangdong, China, 523808) , to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in FCC regulations will have affixed to it a label identical to that submitted for approval with this application. In signing this letter, Applicant certifies that neither the applicant nor any party to the application is not subject to a denial of Federal benefits, that include FCC benefits, pursuant to Section 5301 of theAnti-Drug Abuse Act of 1988, 21 U.S.C. § 862 because of a conviction for possession or distribution of a controlled substance. See 47 CFR 1.2002(b) for the definition of a "party" for these purposes. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for certification, as specified by Nemko North America Inc., still resides with us. Sincerely, Printed name: Michael DiVerde Title: Senior Director Company Name: Relay, Inc. Address: 4200 Six Forks Rd Suite 1800, Raleigh, NORTH CAROLINA 27609, United States Phone: +1(815)529-2004 E-Mail: [email protected] Date: 2024-07-26

RelayInc. 2024-07-26 NemkoNorthAmerica,Inc. 303RiverRoad Ottawa,Ontario,Canada K1V1H2 REQUESTFORCONFIDENTIALITY–FCC FCCID: 2AMBHR220110 PursuanttoSections0.457(d)and0.459oftheCommission’sRulesandFCCGuidancedocument 726920,weherebyrequestpermanentconfidentialtreatmentofexhibitsidentifiedassuchinthetable belowandrequesttheyarepermanentlywithheldfrompublicreviewbasedonthedocumentscontaining tradesecretsandproprietaryinformationnotcustomarilyreleasedtothepublic.Thepublicdisclosureof thisinformationmightbeharmfultotheapplicantandprovideunjustifiedbenefitstoitscompetitors. Wealsorequestshort-termconfidentialityoncertainexhibitsuntiltheintendeddateofmarketingas outlinedbelow.Werequesttheexhibitsbewithheldfrompublicviewforaperiodofinsertnumberof180 days(cannotexceed180days)days.Weattestmarketingoftheproductwillonlycommenceafterthe periodofshort-termconfidentialityexpires,orifmarketingistocommencebeforetherequestednumber ofdayslistedabove,thegranteewillinformNemkotoreleasetheShort-TermConfidentialityinformation withheldontheFCCequipmentauthorizationwebsite. ExhibitTypeofConfidentialityRequested BlockDiagrams ☒Permanent ☐ShortTerm ExternalPhotos------------------☒ShortTerm InternalPhotos☐Permanent*☒ShortTerm OperationDescription ☒Permanent ☐ShortTerm PartsList&Placement/BOM ☐Permanent☐ShortTerm Tune-UpProcedure ☐Permanent ☐ShortTerm SchematicDiagrams☒Permanent ☐ ShortTerm TestSetupPhotos------------------☒ShortTerm User’sManual ☐ Permanent* ☒ShortTerm Theasteriskeditems(*)requirefurtherinformationtobeprovidedinthisjustificationletterbeforepermanentconfidentialitywillbe extendedtotheseexhibits.PleaserefertoFCCKDB726920D01foundat: https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=41731andreviewsectionII,3)regardingspecific informationthatmustaccompanytheserequests. Note:anydocumentsheldundertheShort-Termconfidentialitywillautomaticallybecomepublicafterthe requestedtimeifanappropriateextensionrequesthasnotbeenreceived.Anyexhibits(i.e.,schematic diagrams)thatmayhavealreadybeenrequestedtohave“Permanent”confidentialityasshownaboveneed notberepeatedunderShort-Termconfidentialityrequest. Sincerely, Signed: Printedname:MichaelDiVerde Title:SeniorDirector CompanyName:RelayInc. Address:4200SixForksRdSuite1800,Raleigh,NORTHCAROLINA27609,UnitedStates Phone:+1(815)529-2004 E-Mail:[email protected] Date:2024-07-26

RelayInc. ProductSimilarityDeclaration Productname:WIREDHEADSET Modelname:R-220110,R-220210 FCCID ： 2AMBHR220110 We(RelayInc.)herebystatethatallthemodelsareelectricalidenticalincluding thesamehardwaredesign(i.e.,circuitdesign,PCBLayout,RFmodule/circuit, antennatype(s)andantennalocation,componentsonPCB,etc.,),thedifference are_______ModelNumber,appearanceandstructure_______. ModelPictureDescription R-220110 ThereisaHingeinthemiddle R-220210 ThereisnoHingeinthemiddle Signature: Name:MichaelDiVerde Title:SeniorDirector PlaceUnitedStates,date2024-07-26

HIDDEN WIRE MIC & CONTROLLER Relay, Inc., 4200 Six Forks Rd, Ste 1800, Raleigh, NC 27609 USA © 2024 Relay, Inc. All rights reserved. Relay ® is a registered trademark of Relay, Inc. relaypro.com Model: R-220110 SKU: 40020100A FCC ID: 2AMBHR220110 IC: 25353-R220110 Assembled in Malaysia Hidden Wire Mic & Controller Designed by Relay in Raleigh, NC Scan for safety and warranty information Pacemaker and Other Implanted Devices: This Relay accessory contains magnets and could interfere with pacemakers or other electronic medical devices. Before using this Relay Accessory, consult with your doctor or medical device manufacturer about the required safe distance between Relay accessory and your medical device. OUTSIDE WIRE MIC & CONTROLLER Relay, Inc., 4200 Six Forks Rd, Ste 1800, Raleigh, NC 27609 USA © 2024 Relay, Inc. All rights reserved. Relay ® is a registered trademark of Relay, Inc. relaypro.com Model: R-220210 SKU: 40020200A FCC ID: 2AMBHR220110 IC: 25353-R220110 Assembled in Malaysia Outside Wire Mic & Controller Designed by Relay in Raleigh, NC Scan for safety and warranty information Pacemaker and Other Implanted Devices: This Relay accessory contains magnets and could interfere with pacemakers or other electronic medical devices. Before using this Relay Accessory, consult with your doctor or medical device manufacturer about the required safe distance between Relay accessory and your medical device.

承 認 書 SPECIFICATION FOR APPROVAL 客戶名稱 CUSTOMER ： 客戶料號 CUSTOMER’S P/N ： 料號 PART NUMBER ： WAN1608H245H04 規格 DESCRIPTION ： Chip Antenna 1608 LH Ant 2.45G Type H04 版本 VERSION ： V1.4 日期 ISSUE DATE ： 2023/06/15 客 戶 承 認 CUSTOMER APPROVED 工 程 部 R&D CENTER 承 認 APPROVAL 確 認 CHECKED 製 作 DRAWN Ray Tennyson Snow 萬誠科技股份有限公司 OneWave Electronic Co., Ltd. 112台北市北投區立功街151號1樓 1F, No. 151, Li Gong Street, Beitou District, Taipei City 112, Taiwan 電話: (02) 2898-2220 TEL: +886 2 2898-2220 傳真: (02) 2898-5055 FAX: +886 2 2898-5055 2/12 ONEWAVE TECHNOLOGY CO., LTD. 1608 Chip antenna For Bluetooth / WLAN Applications Dimension (mm) L 1.62 ± 0.20 W 0.83 ± 0.20 T 0.29 ± 0.20 P/N: WAN1608H245H04 3/12 ONEWAVE TECHNOLOGY CO., LTD. Part Number Information WAN 1608 H 245 H 04 A B C D E F A Product Series Antenna B Dimension L x W 1.62X0.83mm ( ± 0.2mm) C Material High K material D Working Frequency 2.4 ~ 2.5GHz E Feeding mode PIFA & Single Feeding F Antenna type Type = 04 1. Electrical Specification Remark : Bandwidth & Peak Gain was measured under evaluation board of next page Specification Part Number WAN1608H245H04 Central Frequency 2450 MHz Bandwidth 85 (Min.) MHz Return Loss -6.5 (Max) dB Peak Gain 1.73 dBi Impedance 50 Ohm Operating Temperature -40～+110 °C Maximum Power 4 W Resistance to Soldering Heats 10 ( @ 260°C) sec. Polarization Linear Azimuth Beamwidth Omni-directional Termination Cu / Sn (Leadless) 4/12 ONEWAVE TECHNOLOGY CO., LTD. 2. Recommended PCB Pattern Evaluation Board Dimension (board size 80x40mm) 2 nd Evaluation Board Dimension Evaluation Board Dimension (board size 80x40mm) Suggested Matching Circuit 重要資訊 : 匹配元件建議使用精準度高的電感±0.1~0.3nH、電容±0.1pF 5/12 ONEWAVE TECHNOLOGY CO., LTD. Layout Dimensions in Clearance area( Size=3.0*4.0mm) FootPrint (Unit : mm) ◆ 2 nd Layout Dimensions in Clearance area( Size=8.0*2.5mm) ※ 此淨空區效能較佳 Matching circuit Tuning Tuning Compo nent Matching circuit 6/12 ONEWAVE TECHNOLOGY CO., LTD. ◆ 3 rd Layout Dimensions in Clearance area( Size=6.0*2.5mm) Tuning Matching circuit 7/12 ONEWAVE TECHNOLOGY CO., LTD. 3. Measurement Results Return Loss 8/12 ONEWAVE TECHNOLOGY CO., LTD. Radiation Pattern Efficiency Peak Gain Directivity 2400MHz 69.36 % 1.62 dBi 3.20 dBi 2450MHz 74.31 % 1.73 dBi 3.01 dBi 2500MHz 70.53 % 1.65 dBi 3.16 dBi Chamber Coordinate System Z Y X 9/12 ONEWAVE TECHNOLOGY CO., LTD. 4.Reliability and Test Condictions ITEM REQUIREMENTS TEST CONDITION Solderability 1. Wetting shall exceed 90% coverage 2. No visible mechanical damage Pre-heating temperature:150°C/60sec. Solder temperature:230±5°C Duration:4±1sec. Solder:Sn-Ag3.0-Cu0.5 Flux for lead free: rosin Solder heat Resistance 1. No visible mechanical damage 2. Central Freq. change :within ± 6% 10 ± 0.5 sec. 60 sec . . T E M P ( °C ) 150 °C 2 6 0 °C Pre-heating temperature:150°C/60sec. Solder temperature:260±5°C Duration:10±0.5sec. Solder:Sn-Ag3.0-Cu0.5 Flux for lead free: rosin Component Adhesion (Push test) 1. No visible mechanical damage The device should be reflow soldered(230±5°C for 10sec.) to a tinned copper substrate A dynometer force gauge should be applied the side of the component. The device must with-ST-F 0.5 Kg without failure of the termination attached to component. Component Adhesion (Pull test) 1. No visible mechanical damage Insert 10cm wire into the remaining open eye bend ,the ends of even wire lengths upward and wind together. Terminal shall not be remarkably damaged. Thermal shock 1. No visible mechanical damage 2. Central Freq. change :within ±6% Phase Temperature(°C) Time(min) 1 +110±5°C 30±3 2 Room Temperature Within 3sec 3 -40±2°C 30±3 4 Room Temperature Within 3sec +110°C=>30±3min -40°C=>30±3min Test cycle:10 cycles The chip shall be stabilized at normal condition for 2~3 hours before measuring. Resistance to High Temperature 1. No visible mechanical damage 2. Central Freq. change :within ±6% 3. No disconnection or short circuit. Temperature: +110±5°C Duration: 1000±12hrs The chip shall be stabilized at normal condition for 2~3 hours before measuring. Resistance to Low Temperature 1. No visible mechanical damage 2. Central Freq. change :within ±6% 3. No disconnection or short circuit. Temperature:-40±5°C Duration: 1000±12hrs The chip shall be stabilized at normal condition for 2~3 hours before measuring. Humidity 1. No visible mechanical damage 2. Central Freq. change :within ±6% 3. No disconnection or short circuit. Temperature: 40±2°C Humidity: 90% to 95% RH Duration: 1000±12hrs The chip shall be stabilized at normal condition for 2~3 hours before measuring. 4±1 sec. 60sec TEMP (°C) 150°C 230°C 10/12 ONEWAVE TECHNOLOGY CO., LTD. 5.Soldering and Mounting Mildly activated rosin fluxes are preferred. The minimum amount of solder can lead to damage from the stresses caused by the difference in coefficients of expansion between solder, chip and substrate. The terminations are suitable for all wave and re-flow soldering systems. If hand soldering cannot be avoided, the preferred technique is the utilization of hot air soldering tools. Recommended temperature profiles for re-flow soldering in Figure 1. Products attachment with a soldering iron is discouraged due to the inherent process control limitations. In the event that a soldering iron must be employed the following precautions are recommended. ‧Preheat circuit and products to 150°C ‧Never contact the ceramic with the iron tip ‧Use a 20 watt soldering iron with tip diameter of 1.0mm ‧280°C tip temperature (max) ‧1.0mm tip diameter (max) ‧Limit soldering time to 3 sec. SOLDERING COOLING NATURAL PRE-HEATING TEMPERATURE(°C) 60~120 s 10s max. 30~60s 250~260 230 180 150 TIME(sec.) Reflow Soldering SOLDERING COOLING NATURAL PRE-HEATING TEMPERATURE(°C) within 3s Gradual cooling 150 TIME(sec.) Iron Soldering Over 60s 350 300 11/12 ONEWAVE TECHNOLOGY CO., LTD. 6.Packaging Information Tape Specification: W Ao Bo Ko P F E D0 D1 Po P2 t 8.0 ±0.30 1.10± 0.05 1.90 ±0.10 0.45 ±0.10 4.00 ±0.05 3.50 ±0.05 1.75 ±0.10 1.50 ±0.10 0.35 ±0.10 4.00 ±0.10 2.00 ±0.05…

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Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 1 of 3 Appendix A System Validation Plots Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 2 of 3 Table of Contents 1. D2450V2-SN: 904 Validation Plot ..................................................................................... 3 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 3 of 3 1. D2450V2-SN: 904 Validation Plot

Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 1 of 3 Appendix B Highest Test Plots Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 2 of 3 Table of Contents 1. BT Head-worn 0mm SAR ....................................................................................................... 3 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 3 of 3 1. BT Head-worn 0mm SAR

Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 1 of 30 Appendix C Calibration Certification Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 2 of 30 Table of Contents 1.@D2450V2-SN: 904 Calibration certification ............................................................................. 3@ 2.@D5GHzV2-SN: 1148 Calibration certification .......................................................................... 9@ 3.@DAE4-SN: 1366 Calibration certification............................................................................... 19@ 4.@EX3DV4-SN: 3906 Calibration certification .......................................................................... 22@ Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 3 of 30 1. D2450V2-SN: 904 Calibration certification Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 4 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 5 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 6 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 7 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 8 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 9 of 30 2. D5GHzV2-SN: 1148 Calibration certification Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 10 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 11 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 12 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 13 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 14 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 15 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 16 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 17 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 18 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 19 of 30 3. DAE4-SN: 1366 Calibration certification Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 20 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 21 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 22 of 30 4. EX3DV4-SN: 3906 Calibration certification Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 23 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 24 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 25 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 26 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 27 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 28 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 29 of 30 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 30 of 30

Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 1 of 5 Appendix D Test setup photograph Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 2 of 5 Table of Contents 1. 2.4G Tissue Body-worn Photograph ...................................................................................... 3 Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 3 of 5 1. 2.4G Tissue Body-worn Photograph Top Side-0mm Bottom Side-0mm Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 4 of 5 Left Side-0mm Right Side-0mm Guangdong Dongdian Testing ServiceCo.,Ltd. Report No.: DDT-RE24053020-2E03 Page 5 of 5 Front side-0mm Back Side-0mm

Guangdong Dongdian Testing ServiceCo.,Ltd. Page 1 of 5 Appendix E Dipole Antenna self-calibration Guangdong Dongdian Testing ServiceCo.,Ltd. Page 2 of 5 Table of Contents 1. Calibration Date ...................................................................................................................... 3 2. Calibration Items ..................................................................................................................... 3 3. Standards ................................................................................................................................ 5 4. Laboratory ............................................................................................................................... 5 5. Calibration Results .................................................................................................................. 5 Guangdong Dongdian Testing ServiceCo.,Ltd. Page 3 of 5 1. Calibration Date Calibration Date Oct.20,2023, Due to Oct.19,2024 2. Calibration Items Dipole Antenna self-calibration 1、 Calibration Method Immediate re-calibration is required for the following conditions. 1) According to KDB 865664 D01, When the most recent return-loss result, measured at least annually, deviates by more than 20% from the previous measurement (i.e. value in dB  0.2) or not meeting the required 20 dB minimum return-loss requirement. 2) When the most recent measurement of the real or imaginary parts of the impedance, measured at least annually, deviates by more than 5 Ω from the previous measurement. 3）When the measured SAR deviates from the calibrated SAR value by more than 10% due to changes in physical, mechanical, electrical or other relevant dipole conditions; i.e., the error is not introduced by incorrect measurement procedures or other issues relating to the SAR measurement system. 2、 Calibration Purpose Demonstrate that SAR target, the impedance and return loss of the dipole remain stable as required 3、 Test The Product Manufacturer Speag Name 2450MHz Dipole antenna Model number D2450V2 Environment temperature 20.8°C Look pictures As shown in figure 1 Manufacturer Speag Name 5GHz Dipole antenna Model numbe D5GHZV2 Environment temperature 20.8°C Look pictures As shown in figure 2 Guangdong Dongdian Testing ServiceCo.,Ltd. Page 4 of 5 Figure 1 Test signal source Figure 2 Test signal source Guangdong Dongdian Testing ServiceCo.,Ltd. Page 5 of 5 3. Standards This antenna calibration is conducted according to KDB 865664 D01 4. Laboratory The following personnel participated in this laboratory: Table 1： Participate in the measurement laboratory Laboratory Name Temp°C Test person Guangdong Dongdian Testing Service Co., Ltd. 20.8°C Johnson Huang 5. Calibration Results The quality control test results are shown in Table 2 and Table 3, and the detailed test data is in the attachment Table 2 Calibrated Antenna Target Return loss Test Return loss Deviation Result 2450 -28.825 -28.394 1.50% OK 5200 -24.780 -20.041 19.12% OK 5300 -24.151 -27.179 12.54% OK 5500 -23.082 -25.183 9.10% OK 5600 -22.239 -23.471 5.54% OK Table 3 Calibrated Antenna Target Impedance （Real） Target Impedance （Imaginary Test Impedance （Real） Test Impedance （Imaginary） Deviation （Real） Deviation （Imaginary） Result 2450 53.391 1.586 50.607 2.878 2.784 1.292 OK 5200 49.477 -8.009 52.310 -8.448 2.833 0.439 OK 5300 54.645 -5.723 49.946 -3.293 4.699 2.43 OK 5500 56.887 -4.538 52.061 -5.591 4.826 1.053 OK 5600 56.214 -5.378 52.520 -4.505 3.694 0.873 OK

Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24053020-2E03 TRF No.: RT-4-E-02-601 FCC SAR Test Report Ver.1.1 Page 1 of 28 FCC AND ISED SAR TEST REPORT Applicant : Relay, Inc. Address of Applicant : 4200 Six Forks Rd, Suite 1800 N/A, Raleigh North Carolina, 27609, United States. Manufacturer : Relay, Inc. Address of Manufacturer : 4200 Six Forks Rd, Suite 1800 N/A, Raleigh North Carolina, 27609, United States. Equipment under Test : WIRED HEADSET Model No. : R-220110, R-220210 FCC ID : 2AMBHR220110 IC : 25353-R220110 Test Standard(s) : Test Standard Used: IEEE Std. 1528-2013; IEC/IEEE 62209-1528:2020 FCC Rules and Regulations: 47 CFR § 2.1093 ISED Rules and Regulations: RSS-102 Issue6, Dec. 2023 Test Procedure Used: KDB447498 D04 v01, KDB 865664 D01 v01r04, KDB 865664 D02 v01r02 Report No. : DDT-RE24053020-2E03 Issue Date : 2024/07/23 Issue By : Guangdong Dongdian Testing Service Co., Ltd. Address of Laboratory : Unit 2, Building 1, No. 17, Zongbu 2nd Road, Songshan Lake Park, Dongguan, Guangdong, China, 523808 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24053020-2E03 TRF No.: RT-4-E-02-601 FCC SAR Test Report Ver.1.1 Page 2 of 28 Table of Contents 1. General test information ...................................................................................................... 6 1.1. Description of EUT .............................................................................................................. 6 1.2. Accessories of EUT ............................................................................................................. 6 1.3. Assistant equipment used for test ....................................................................................... 6 1.4. Block diagram of EUT configuration for test ....................................................................... 6 1.5. Test environment conditions ............................................................................................... 7 1.6. Test laboratory .................................................................................................................... 7 2. Summary of test results ...................................................................................................... 8 2.1. Report SAR results ............................................................................................................. 8 2.2. RF exposure limits .............................................................................................................. 8 3. SAR measurements system configuration .......................................................................... 9 3.1. The SAR measurement system .......................................................................................... 9 3.2. Isotropic E-field probe EX3DV4 ........................................................................................ 10 3.3. SAM twin phantom ............................................................................................................ 10 3.4. ELI phantom ...................................................................................................................... 11 3.5. Data acquisition electronics (DAE) ................................................................................... 11 3.6. Device holder for transmitters ........................................................................................... 12 4. Measurement procedure ................................................................................................... 13 4.1. Scanning procedure .......................................................................................................... 13 5. Description of test position ................................................................................................ 15 5.1. Body-worn accessory configurations ................................................................................ 15 5.2. Extremity exposure configurations .................................................................................... 16 6. RF exposure conditions .................................................................................................... 17 6.1. EUT Test sides .................................................................................................................. 17 6.2. Standalone SAR test exclusion considerations ................................................................ 17 7. SAR system verification procedure ................................................................................... 19 7.1. Tissue simulate liquid ........................................................................................................ 19 7.1.1. Target dielectric properties of head tissue-equivalent material ........................................ 19 7.1.2. Measurement for tissue simulate liquid ............................................................................ 19 7.2. SAR system validation ...................................................................................................... 20 7.2.1. Justification for extended SAR dipole calibrations ............................................................ 21 7.2.2. Validation test setup photograph ...................................................................................... 22 7.2.3. Summary system validation results .................................................................................. 23 7.2.4. Detailed system validation results ..................................................................................... 23 8. Equipment list .................................................................................................................... 24 9. Measurement uncertainty .................................................................................................. 25 Guangdong Dongdian Testing Service Co., Ltd. Report No.: DDT-RE24053020-2E03 TRF No.: RT-4-E-02-601 FCC SAR Test Repor…

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Guangdong Dongdian Testing Service Co., Ltd. Report No.:DDT-RE24053020-2E01 TRF No.: RT-4-E-02-001 RF test report Ver. 1.0 Page 1 of 106 FCC AND ISED CERTIFICATION TEST REPORT Applicant : Relay, Inc. Address of Applicant : 4200 Six Forks Rd, Suite 1800 N/A, Raleigh North Carolina, 27609, United States. Manufacturer : Relay, Inc. Address of Manufacturer : 4200 Six Forks Rd, Suite 1800 N/A, Raleigh North Carolina, 27609, United States. Equipment under Test : WIRED HEADSET Model No. : R-220110, R-220210 FCC ID : 2AMBHR220110 IC : 25353-R220110 Test Standard(s) : FCC Rules and Regulations Part 15 Subpart C, RSS-247 Issue 3 August 2023, ANSI C63.10:2013, RSS-Gen Issue 5, Apr. 2018, Amendment 2 (February 2021) Report No. : DDT-RE24053020-2E01 Issue Date : 2024/07/23 Issue By : Guangdong Dongdian Testing Service Co., Ltd. Unit 2, Building 1, No. 17, Zongbu 2nd Road, Songshan Lake Park, Dongguan, Guangdong, China, 523808 Guangdong Dongdian Testing Service Co., Ltd. Report No.:DDT-RE24053020-2E01 TRF No.: RT-4-E-02-001 RF test report Ver. 1.0 Page 2 of 106 Table of Contents 1. Summary of Test Results ............................................................................................. 7 2. General Test Information .............................................................................................. 8 2.1. Description of EUT ........................................................................................................ 8 2.2. Accessories of EUT ...................................................................................................... 9 2.3. Block diagram of EUT configuration for test ................................................................. 9 2.4. Decision of final test mode ........................................................................................... 9 2.5. Deviations of test standard ......................................................................................... 10 2.6. Test environment conditions ....................................................................................... 10 2.7. Test laboratory ............................................................................................................ 10 2.8. Measurement uncertainty ........................................................................................... 11 3. Equipment Used During Conductive Test ..............................…

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