2BH58-A9PROSmart wireless stereo bluetooth headphone

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These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: ЬReorient or relocate the receiving antenna. ЬIncrease the separation between the equipment and receiver. ЬConnect the equipment into an outlet on a circuit different from that to which the receiver is connected. ЬConsult the dealer or an experienced radio/TV technician for help. Caution: Any changes or modifications to this device not explicitly approved by manufacturer could void your authority to operate this…

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US Agent for Service of Process LETTER OF ATTESTATION TO: Office of Engineering Technolog y Federal Co mmunications Commission 7435 Oakland Mills Road Columbia, MD 21046 US A gent for Service of Process: Company Name: AOCE Corporation Inc FRN: 0033401381 Contact Name: Johnson.wang Telephone: 1- 346 582 - 5234 Email: wwb」[email protected] Applicant: Company name: Dong Guan Yinyuezhitong Electronics Co.,L TD Grantee code:GC741411 FCC ID :2BH58-A9PRO FRN :0035779354 Contact Name:zongqiang liu Email:[email protected] Address:Building A, 419 Jinxing Road, Liaobu, Dongguan [Dong Guan Y inyuezhitong Electronics Co.,LTD] certifies that, as of the date of this filing of the application with the TCB, [AOCE Corporation Inc. ] is our designated US agent for service of process for the above referenced FCC ID. [Dong Guan Yinyuezhitong Electronics Co.,LTD] accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any commission related proceeding involving equipment. [AOCE Corporation Inc.] accepts, as of the date of the filing of the application, the obligation of the designated US agent for service of process for the above reference FCC ID. The US Agent for Service of Process is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause §2.911. The Applicant is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22 - 84, and clause§2.911. Date: 08/12/2024 Applicant's Name:zon Title: Manager liu ｀辽,)';,<尸;,if -" Signature 1 / 1 US Agent's Name: Johnson.wang Signature / '✓'

Dong Guan Yinyuezhitong Electronics Co.,LTD 8/14/2024 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for FCC ID: 2BH58-A9PRO Dong Guan Yinyuezhitong Electronics Co.,LTD (“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. Yours sincerely, Signature: August 14, 2024 Name: Zongqiang Liu Position: Manager Company Name: Dong Guan Yinyuezhitong Electronics Co.,LTD Address: Building A, 419 Jinxing Road, Liaobu, Dongguan Tel: +86 15814070606 Fax: / Email: [email protected] Dong Guan Yinyuezhitong Electronics Co.,LTD 8/14/2024 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for FCC ID: 2BH58-A9PRO Dong Guan Yinyuezhitong Electronics Co.,LTD (“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. Yours sincerely, Signature: August 14, 2024 Name: Zongqiang Liu Position: Manager Company Name: Dong Guan Yinyuezhitong Electronics Co.,LTD Address: Building A, 419 Jinxing Road, Liaobu, Dongguan Tel: +86 15814070606 Fax: / Email: [email protected]

Dong Guan Yinyuezhitong Electronics Co.,LTD Difference Description We Dong Guan Yinyuezhitong Electronics Co.,LTD state: Product name: Smart wireless stereo bluetooth headphone Model(s): A9 Pro, A10 Pro, WT-2, Z50, T13 All the models are electrical identical including the same software parameter and hardware design (i.e., circuit design, PCB Layout, RF module/circuit, antenna type(s) and antenna location, components on PCB, etc.,), same mechanical structure and design (including product enclosure, materials, etc.,), the only difference is the model name. Signature: August 14, 2024 Name: Zongqiang Liu Position: Manager Company Name: Dong Guan Yinyuezhitong Electronics Co.,LTD Address: Building A, 419 Jinxing Road, Liaobu, Dongguan Tel: +86 15814070606 Fax: / Email: [email protected]

Dong Guan Yinyuezhitong Electronics Co.,LTD 8/14/2024 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR Product Name: Smart wireless stereo bluetooth headphone FCC ID: 2BH58-A9PRO Model(s): A9 Pro, A10 Pro, WT-2, Z50, T13 To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the (Schematic Diagram, Block Diagram, Operational Description) required to be submitted with this application be permanently withheld from public review. 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 Please contact me if there is any information you may need. Yours sincerely, Signature: August 14, 2024 Name: Zongqiang Liu Position: Manager Company Name: Dong Guan Yinyuezhitong Electronics Co.,LTD Address: Building A, 419 Jinxing Road, Liaobu, Dongguan Tel: +86 15814070606 Fax: / Email: [email protected]

Dong Guan Yinyuezhitong Electronics Co.,LTD 8/14/2024 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize (Shenzhen PSI Testing Co., Ltd.) to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). This agreement expires one year from the current date. Yours sincerely, Signature: August 14, 2024 Name: Zongqiang Liu Position: Manager Company Name: Dong Guan Yinyuezhitong Electronics Co.,LTD Address: Building A, 419 Jinxing Road, Liaobu, Dongguan Tel: +86 15814070606 Fax: / Email: [email protected]

Page 1 of 4 Report No.: psi2407112-C01-R04 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Appendix II external photos FCC ID: 2BH58-A9PRO Page 2 of 4 Report No.: psi2407112-C01-R04 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Page 3 of 4 Report No.: psi2407112-C01-R04 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Page 4 of 4 Report No.: psi2407112-C01-R04 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China ------End------

Label: FCC ID: 2BH58-A9PRO Label location

Page 1 of 4 Report No.: psi2407112-C01-R04 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Appendix III internal photos FCC ID: 2BH58-A9PRO BT ANT Page 2 of 4 Report No.: psi2407112-C01-R04 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China BT ANT Page 3 of 4 Report No.: psi2407112-C01-R04 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Page 4 of 4 Report No.: psi2407112-C01-R04 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China ------End------

FCC ID: 2BH58-A9PRO Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China RF Exposure evaluation According to 447498 D01 General RF Exposure Guidance v06 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 EDR: Worse case output power is as below: [2441MHz: 5.40dBm] Antenna Gain is 1.7dBi Maximum output power is 5.40dBm (3.47mW). (3.47mW /5mm)·[√2.441(GHz)]= 1.08<3.0 for 1-g SAR Then SAR evaluation is not required

2.4GHz 2012 Chip Antenna: RANT2012F245C07 Dimension (mm) L2.05+-0.10 W1.20+-0.10 T0.65+-0.10 No.Terminal Name 1Feeding/GNG 2GND Application: WLAN, 802.11b/g, Bluetooth, WLAN, etc... Features SMD, high reliability, ultra Impact, Omni-directional... Part number Information RANT2012F245C07 (A)(B)(C)(D)(E)(F) (A)Product TypeChip Antenna (B) Size Code2.0x1.2mm(+-0.2mm) (C) MaterialHigh K material (D) Frequency2.4 ~ 2.5GHz (E) Feeding modePIFA & Single Feeding (F) Antenna typeType=07 Electrical Specification Working Frequency Range2400 ~2500MHz Bandwidth84 (Min.) Peak Gain1.7 dBi (Max) Impedance50 Ohm Return loss10 dB ( Min) PolarizationLinear Azimuth BeamwidthOmni-directional Operation Temperature( °C )-40 ~85 °C Resistance to Soldering Heats 10sec. ( @ 280°C) TerminationNi / Au (Leadless) The specification is defined on EVB. Dimension and Terminal Configuration Manufacturer: RAIN International Technology Co., Ltd. 7 / F, Building F, Zhichuang Park, Tong 'an, Gushu, Shenzhen 2.4GHz2012ChipAntenna:RANT2012F245C07 EvaluationBoardReference PCBDimensionAntennaLayoutReferenceUnit:mm ElectricalCharacteristics ReturnLoss ReturnLoss&Radiation 1 Frequency(MHz) S11(dB) 2400-10.77 2450-24.81 2484-10.243 Radiation Z Y X 2400MHz2450MHz2500MHz Efficiency70.56%75.25%71.01% 2.4GHz2012ChipAntenna:RANT2012F245C07 TapingSpecifications ReelandTapingSpecification ReelSpecification TYPESIZEABCD 20127”5K/Reel 9.0±0.5 60±213.5±0.5178±2 TappingSpecification PackagingTypeABWEFGHTDP PaperType2012 1.50±0.202.30±0.208.0±0.201.75±0.103.5±0.054.0±0.102.0±0.050.75±0.101.57±0.104.0±0.1 2.4GHz2012ChipAntenna:RANT2012F245C07 ReliabilityTable TestItemProcedure Requirements CeramicType Remark (Reference) Electrical Characterization Fulfilltheelectrical specification UserSpec. Thermal Shock 1.Preconditioning: 50±10°C/1hr,thenkeepfor24±1hrsatroomtemp. 2.Initialmeasure:Spec:referInitialspec. 3.Rapidchangeoftemperaturetest: -30°Cto+85°C;100cycles; 15minutesatLowercategorytemperature; 15minutesatUppercategorytemperature. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 107 Temperature Cycling 1.Initialmeasure:Spec:referInitialspec. 2.100Cycles(-30°Cto+85°C),SoakMode=1(2Cycle/hours). 3.Measurementat24±2Hoursaftertestcondition. NoVisibleDamage. Fulfilltheelectrical specification. JESD22 JA104 HighTemperature Exposure 1.Initialmeasure:Spec:referInitialspec. 2.Unpowered;500hours@T=+85°C. 3.Measurementat24±2hoursaftertest. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 108 LowTemperature Storage 1.Initialmeasure:Spec:referInitialspec. 2.Unpowered:500hours@T=-30°C. 3.Measurementat24±2hoursaftertest. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 108 Solderability (SMDBottomSide) Dippingmethod: a.Temperature:235±5°C b.Dippingtime:3±0.5s Thesoldershouldcover over95%ofthecritical areaofbottomside. IEC60384-21/22 4.10 SolderingHeat Resistance (RSH) Preheatingtemperature:150±10°C. Preheatingtime:1~2min. Soldertemperature:260±5°C. Dippingtime:5±0.5s NoVisibleDamage.IEC60384-21/22 4.10 Vibration5g'sfor20min.,12cycleseachof3orientations Note:Use8"X5"PCB.031"thick7securepointson,onelong sideand2securepointsatcornersofoppositesides.Parts mountedwithin2"fromanysecurepoint.Testfrom10-2000 Hz. NoVisibleDamage.MIL-STD-202 Method204 Mechanical Shock Threeshocksineachdirectionshallbeappliedalongthethree mutuallyperpendicularaxesofthetestspecimen(18shocks) Peakvalue:1,500g’s Duration:0.5ms Velocitychange:15.4ft/s Waveform:Half-sine NoVisibleDamage.MIL-STD-202 Method213 Humidity Bias 1.Humidity:85%R.H.,Temperature:85±2°C. 2.Time:500±24hours. 3.Measurementat24±2hrsaftertestcondition. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 Method106 2.4GHz2012ChipAntenna:RANT2012F245C07 2.4GHz2012ChipAntenna:RANT2012F245C07 _ Board Flex (SMD) 1.Mountingmethod: IR-Reflow.PCBSize(L:100×W:40×T:1.6mm) 2.Applytheloadindirectionofthearrowuntilbendingreaches 2mm. NoVisibleDamage.AEC-Q200 005 AdhesionForceof1.8Kgfor60seconds.NoVisibleDamage Magnificationof20Xor greatermaybeemployed forinspectionofthe mechanicalintegrityofthe devicebodyterminalsand body/terminaljunction. AEC-Q200 006 Physical Dimension Anyapplicablemethodusingx10magnification,micrometers, calipers,gauges,contourprojectors,orothermeasuring equipment,capableofdeterminingtheactualspecimen dimensions. Inaccordancewith specification. JESD22 JB100 RevisionHistory RevisionDateContent 12020/10/15NewDatasheet

Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China FCC TEST REPORT FCC ID: 2BH58-A9PRO On Behalf of Dong Guan Yinyuezhitong Electronics Co.,LTD Smart wireless stereo bluetooth headphone Model No.: A9 Pro, A10 Pro, WT-2, Z50, T13 Prepared for : Dong Guan Yinyuezhitong Electronics Co.,LTD Address : Building A, 419 Jinxing Road, Liaobu, Dongguan Prepared By : Shenzhen PSI Testing Co., Ltd. Address : 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Report Number : psi2407112-C01-R04 Date of Receipt : July 23, 2024 Date of Test : July 23, 2024-July 29, 2024 Date of Report : July 29, 2024 Version Number : V0 Page 2 of 80 Report No.: psi2407112-C01-R04 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China TABLE OF CONTENTS Description Page 1. Summary Of Standards And Results............................................................................................ 6 1.1. Description of Standards and Results ..................................................................................... 6 2. General Information........................................................................................................................ 7 2.1. Description of Device (EUT) .................................................................................................... 7 2.2. Accessories of Device (EUT) .................................................................................................. 8 2.3. Tested Supporting System Details .......................................................................................... 8 2.4. Block Diagram of connection between EUT and simulators ................................................... 8 2.5. Test Mode Description ............................................................................................................. 8 2.6. Test Conditions ........................................................................................................................ 9 2.7. Test Facility .............................................................................................................................. 9 2.8. Measurement Uncertainty ....................................................................................................... 9 2.9. Test Equipment List ............................................................................................................... 10 3. Maximum Peak Output Power ..................................................................................................... 11 3.1. Limit ....................................................................................................................................... 11 3.2. Test Procedure ...................................................................................................................... 11 3.3. Test Setup .............................................................................................................................. 11 3.4. Test Result ............................................................................................................................. 11 4. Bandwidth ..................................................................................................................................... 12 4.1. Limit ....................................................................................................................................... 12 4.2. Test Procedure ...................................................................................................................... 12 4.3. Test Result ............................................................................................................................. 12 5. Carrier Frequency Separation ..................................................................................................... 23 5.1. Limit ....................................................................................................................................... 23 5.2. Test Procedure ...................................................................................................................... 23 5.3. Test Result ............................................................................................................................. 23 6. Number Of Hopping Channel ...................................................................................................... 25 6.1. Limit ....................................................................................................................................... 25 6.2. Test Procedure ...................................................................................................................... 25 6.3. Test Result ............................................................................................................................. 25 7. Dwell Time ..................................................................................................................................... 27 7.1. Test limit ................................................................................................................................. 27 7.2. Test Procedure ...................................................................................................................... 27 7.3. Test Result ............................................................................................................................. 27 8. Out-of-band Emissions ..................................................................................................…

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Page 1 of 2 Report No.: psi2407112-C01-R04 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Appendix I Test Setup Photo FCC ID: 2BH58-A9PRO Spurious Radiation Emissions Test (<1G) Spurious Radiation Emissions Test (＞1G) Page 2 of 2 Report No.: psi2407112-C01-R04 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Conducted emission Test ------End------