2AX2T-W40Wireless earphone

FCC Caution： This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. 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: -Reorient or relocate the receiving antenna. -Increase the separation between the equipment and receiver. -Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. -Consult the dealer or an experienced radio/TV technician for help. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction.

Hoco technology development (SHENZHEN) co.,Ltd Model Difference Product description: Wireless earphone Model name: W40 W23, W25, W27, W28, W30, W33, W35, W39, W41, W42, W43, W44, W45, W46, W47, W48, W49, W50, W51 Trade Name: FCC ID: 2AX2T-W40 All the model are the same circuit and RF module, except model names. Regards Sincerely Client’s signature: Client’s name / title : ZHU WENFU/Manager Contact information / address: Rm 408,Block A,Weidonglong Business Building, 2125 Meilong Road, Tsinghua Community, Longhua Street, Longhua District, Shenzhen, China

Hoco technology development (SHENZHEN) co.,Ltd 2022.12.14 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR EUT NAME: Wireless earphone Trademark: MODEL : W40 W23, W25, W27, W28, W30, W33, W35, W39, W41, W42, W43, W44, W45, W46, W47, W48, W49, W50, W51 FCC ID: 2AX2T-W40 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 - Block Diagram - Schematics - Operational Description required to be submitted with this application be permanently withheld from public review. The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. Please contact me if there is any information you may need. Sincerely, Client’s signature: Client’s name / title : ZHU WENFU/Manager Contact information / address: Rm 408,Block A,Weidonglong Business Building, 2125 Meilong Road, Tsinghua Community, Longhua Street, Longhua District, Shenzhen, China

Hoco technology development (SHENZHEN) co.,Ltd 2022.12.14 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen BCTC 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. Sincerely, Client’s signature: Client’s name / title : ZHU WENFU/Manager Contact information / address: Rm 408,Block A,Weidonglong Business Building, 2125 Meilong Road, Tsinghua Community, Longhua Street, Longhua District, Shenzhen, China

External Photos

Label & label location 10mm*5mm FCC ID: 2AX2T-W40

Internal Photos Antenna

RF EXPOSURE EVALUATION METHOD FCC ID: 2AX2T-W40 Applicable standard： In accordance with FCC 47 CFR part 2 (2.1093) this device has been defined as a portable device which is defined as a transmitting device designed to be used so that the radiating structure(s) of the device is/are within 20 centimeters of the body of the user. Portable devices must be evaluated using the specified in FCC 47 CFR part 2 (2.1093) and ANSI/IEEEC95.1-1992. and had been tested in accordance with the measurement methods and procedures specified in IEEE 1528-2003. Per FCC KDB 447498 D01 v06, the 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances s 50 mm are determined by: 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. BT GFSK Low -1.408 21 GFSK Middle 0.153 21 GFSK High 1.140 21 π/ 4 DQPSK Low -0.643 21 π/ 4 DQPSK Middle 0.861 21 π/ 4 DQPSK High 1.843 21 8DPSK Low -0.158 21 8DPSK Middle 1.316 21 8DPSK High 2.177 21 max possible output power (PK,conducted)：3±1dBm -0.58dBi logarithmic terms convert to numeric result is nearly 0.875 4dBm=2.51mW 2402MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 2.51/5*√2.402=0.78≤3.0 2441MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 2.51/5*√2.440=0.78≤3.0 2480MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 2.51/5*√2.48=0.79≤3.0 Conclusion: 1. [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] * [√f(GHz)] < 3.0. 2. SAR Test Exclusion Thresholds is 3.0 for separation distance 5mm. Therefore, SAR test is not required.

Inverted F Antenna Specification Summary ITEM ANT SPEC Model Name 2.4G ANT Center Horizontal Vertical 2400MHz 2400MHz 2500MHz 2400MHz 2400MHz 2500MHz Frequency -1.26-0.76-0.58-5.25-2.46-1.86 MAX. Gain -0.58dB Polarization Horizontal and Vertical Azimuth Beam Omni-directional Pattern Impedance 50 Ohm Antenna Length 38.20mm Manufacture ZHUHAI JIELI TECHNOLOGY CO.,LTD Antenna Photo & Length (mm) Address 333 Nanqin Road, Xiangzhou District, Zhuhai City, Guangdong Province Horizontal: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -40 Scale: 5/div Frequency Gain(dB) (MHz) Max Min Avg 2400 -1.26174 -30.0801 -7.18716 2450 -0.765802 -36.5604 -7.48023 2500 -0.585582 -22.0315 -6.59127 Vertical: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -30 Scale: 5/div Frequency Gain(dB) (MHz) Max Min Avg 2400 -5.2537 -22.1424 -12.4294 2450 -2.4652 -24.5837 -10.4702 2500 -1.86120 -29.5214 -9.20432 ANT Test Labs：Attestation of Global Compliance Co., Ltd.

No.：BCTC/RF-EMC-007 Page: 1 of 68 Edition：A.5 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2212840912E Applicant: Hoco technology development (SHENZHEN) co.,Ltd Product Name: Wireless earphone Model/Type reference: W40 Tested Date: 2022-12-05 to 2022-12-12 Issued Date: 2022-12-12 Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 2 of 68 Edition：A.5 FCC ID:2AX2T-W40 The test report is effective only with both signature and specialized stamp.This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen BCTC Testing Co., Ltd, this report can’t be reproduced except in full.The tested sample(s) and the sample information are provided by the client. Product Name: Wireless earphone Trademark: Model/Type reference: W40 W23, W25, W27, W28, W30, W33, W35, W39, W41, W42, W43, W44, W45, W46, W47, W48, W49, W50, W51 Prepared For: Hoco technology development (SHENZHEN) co.,Ltd Address: Rm 408, Block A, Weidonglong Business Building, 2125 Meilong Road, Tsinghua C ommunity, Longhua Street, Longhua District, Shenzhen, P. R. China Manufacturer: Hoco technology development (SHENZHEN) co.,Ltd Address: Rm 408, Block A, Weidonglong Business Building, 2125 Meilong Road, Tsinghua C ommunity, Longhua Street, Longhua District, Shenzhen, P. R. China Prepared By: Shenzhen BCTC Testing Co., Ltd. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Zhancheng, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: 2022-12-05 Sample tested Date: 2022-12-05 to 2022-12-12 Issue Date: 2022-12-12 Report No.: BCTC2212840912E Test Standards: FCC Part15.247 ANSI C63.10-2013 Test Results: PASS Remark: This is Bluetooth Classic radio test report. Tested by: Approved by: Kelsey Tan/ Project Handler Zero Zhou/Reviewer Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 3 of 68 Edition：A.5 Table Of Content Test Report Declaration Page 1. Version .................................................................................................................. 5 2. Test Summary ....................................................................................................... 6 3. Measurement Uncertainty ..................................................................................... 7 4. Product Information And Test Setup ..................................................................... 8 4.1 Product Information ............................................................................................... 8 4.2 Test Setup Configuration ...................................................................................... 8 4.3 Support Equipment ............................................................................................... 9 4.4 Channel List .......................................................................................................... 9 4.5 Test Mode ........................................................................................................... 10 4.6 Table Of Parameters Of Text Software Setting ................................................... 10 5. Test Facility And Test Instrument Used ............................................................... 11 5.1 Test Facility ......................................................................................................... 11 5.2 Test Instrument Used .......................................................................................... 11 6. Conducted Emissions .......................................................................................... 13 6.1 Block Diagram Of Test Setup .............................................................................. 13 6.2 Limit .................................................................................................................... 13 6.3 Test procedure .................................................................................................... 13 6.4 EUT operating Conditions ................................................................................... 13 6.5 Test Result .......................................................................................................... 14 7. Radiated Emissions ............................................................................................. 16 7.1 Block Diagram Of Test Setup .............................................................................. 16 7.2 Limit .................................................................................................................... 17 7.3 Test procedure .................................................................................................... 18 7.4 EUT operating Conditions ................................................................................... 19 7.5 Test Result .......................................................................................................... 20 8. Radiated Band Emission Measurement And Restricted Bands Of Operation ..... 24 8.1 Block Diagram Of Test Setup .............................................................................. 24 8.2 Limit .................................................................................................................... 24 8.3 Test procedure .................................................................................................... 25 8.4 EUT operating Conditions ................................................................................... 25 8.5 Test Result .......................................................................................................... 26 9. Spurious RF Conducted Emissions ..................................................................... 27 9.1 Block Diagram Of Test Setup .............................................................................. 27 9.2 Limit .................................................................................................................... 27 9.3 Test pr…

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Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 39 of 68 Edition：A.5 GFSK Middle Channel GFSK High Channel Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 40 of 68 Edition：A.5 π/ 4 DQPSK Low Channel π/ 4 DQPSK Middle Channel Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 41 of 68 Edition：A.5 π/ 4 DQPSK High Channel 8DPSK Low Channel Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 42 of 68 Edition：A.5 8DPSK Middle Channel 8DPSK High Channel Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 43 of 68 Edition：A.5 11. Maximum Peak Output Power 11.1 Block Diagram Of Test Setup 11.2 Limit FCC Part15 (15.247) , Subpart C Section Test Item Limit Frequency Range (MHz) Result 15.247(b)(1) Peak Output Power 0.125 watt or 21dBm 2400-2483.5 PASS 11.3 Test procedure 1. Remove the antenna from the EUT and then connect a low RF cable from the antenna port to the spectrum. 2. Set the spectrum analyzer: RBW = 3MHz. VBW = 10MHz. Sweep = auto; Detector Function = Peak. 3. Keep the EUT in transmitting at lowest, medium and highest channel individually. Record the max value. Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 44 of 68 Edition：A.5 11.4 Test Result Temperature: 26 °C Relative Humidity: 54% Pressure: 101KPa Test Voltage : DC 3.7V Modulation Test Channel Output Power (dBm) Limit (dBm) GFSK Low -1.408 21 GFSK Middle 0.153 21 GFSK High 1.140 21 π/ 4 DQPSK Low -0.643 21 π/ 4 DQPSK Middle 0.861 21 π/ 4 DQPSK High 1.843 21 8DPSK Low -0.158 21 8DPSK Middle 1.316 21 8DPSK High 2.177 21 Test plots GFSK Low Channel Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 45 of 68 Edition：A.5 GFSK Middle Channel GFSK High Channel Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 46 of 68 Edition：A.5 π/ 4 DQPSK Low Channel π/ 4 DQPSK Middle Channel Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 47 of 68 Edition：A.5 π/ 4 DQPSK High Channel 8DPSK Low Channel Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 48 of 68 Edition：A.5 8DPSK Middle Channel 8DPSK High Channel Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 49 of 68 Edition：A.5 12. Hopping Channel Separation 12.1 Block Diagram Of Test Setup 12.2 Limit Frequency hopping systems shall have hopping channel carrier frequencies separated by a minimum of 25 kHz or the 20 dB bandwidth of the hopping channel, whichever is greater. Alternatively, frequency hopping systems operating in the 2400-2483.5 MHz band may have hopping channel carrier frequencies that are separated by 25 kHz or two-thirds of the 20 dB bandwidth of the hopping channel, whichever is greater, provided the systems operate with an output power no greater than 0.125W. 12.3 Test procedure 1. Remove the antenna from the EUT and then connect a low RF cable from the antenna port to the spectrum. 2. Set the spectrum analyzer: RBW = 30kHz. VBW = 100kHz , Span = 2.0MHz. Sweep = auto; Detector Function = Peak. Trace = Max hold. 3. Allow the trace to stabilize. Use the marker-delta function to determine the separation between the peaks of the adjacent channels. The limit is specified in one of the subparagraphs of this Section Submit this plot. Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 50 of 68 Edition：A.5 12.4 Test Result Modulation Test Channel Separation (MHz) Limit(MHz) Result GFSK Low 1.002 0.992 PASS GFSK Middle 0.994 0.681 PASS GFSK High 1.000 0.684 PASS π/ 4 DQPSK Low 1.002 0.828 PASS π/ 4 DQPSK Middle 0.998 0.843 PASS π/ 4 DQPSK High 0.998 0.851 PASS 8DPSK Low 1.002 0.806 PASS 8DPSK Middle 1.000 0.807 PASS 8DPSK High 1.002 0.834 PASS Test plots GFSK Low Channel Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 51 of 68 Edition：A.5 GFSK Middle Channel GFSK High Channel Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 52 of 68 Edition：A.5 π/ 4 DQPSK Low Channel π/ 4 DQPSK Middle Channel Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 53 of 68 Edition：A.5 π/ 4 DQPSK High Channel 8DPSK Low Channel Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 54 of 68 Edition：A.5 8DPSK Middle Channel 8DPSK High Channel Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 55 of 68 Edition：A.5 13. Number Of Hopping Frequency 13.1 Block Diagram Of Test Setup 13.2 Limit Frequency hopping systems in the 2400-2483.5 MHz band shall use at least 15 channels. 13.3 Test procedure 1. Remove the antenna from the EUT and then connect a low RF cable from the antenna port to the spectrum. 2. Set the spectrum analyzer: RBW = 100kHz. VBW = 300kHz. Sweep = auto; Detector Function = Peak. Trace = Max hold. 3. Allow the trace to stabilize. It may prove necessary to break the span up to sections. in order to clearly show all of the hopping frequencies. The limit is specified in one of the subparagraphs of this Section. 4. Set the spectrum analyzer: Start Frequency = 2.4GHz, Stop Frequency = 2.4835GHz. Sweep=auto; Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 56 of 68 Edition：A.5 13.4 Test Result Test Plots: 79 Channels in total GFSK π/ 4 DQPSK Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 57 of 68 Edition：A.5 8DPSK Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 58 of 68 Edition：A.5 14. Dwell Time 14.1 Block Diagram Of Test Setup 14.2 Limit Frequency hopping systems in the 2400-2483.5 MHz band shall use at least 15 channels. The average time of occupancy on any channel shall not be greater than 0.4 seconds within a period of 0.4 seconds multiplied by the number of hopping channels employed. Frequency hopping systems may avoid or suppress transmissions on a particular hopping frequency provided that a minimum of 15 channels are used. 14.3 Test procedure 1. Remove the antenna from the EUT and then connect a low RF cable from the antenna port to the spectrum. 2. Set spectrum analyzer span = 0. Centred on a hopping channel; 3. Set RBW = 1MHz and VBW = 3MHz.Sweep = as necessary to capture the entire dwell time per hopping channel. Set the EUT for DH5, DH3 and DH1 packet transmitting. 4. Use the marker-delta function to determine the dw…

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Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 66 of 68 Edition：A.5 17. EUT Test Setup Photographs Conducted emissions Report No.: BCTC2212840912E No.：BCTC/RF-EMC-007 Page: 67 of 68 Edition：A.5 Radiated Measurement Photos