2AML5-BTW92Wireless Earphone

KVANCE TECHNOLOGY CO.,LTD Model Difference 2023-01-12 EUT NAME: Wireless Earphone MODEL : BTW92, BTW92C FCC ID: 2AML5-BTW92 All the model are the same circuit and RF module, only for model name. Regards Sincerely Client’s signature: Client’s name / title : Levy Xie / Manager Contact information / address: 4 floor, Building A, No. 103, Baonan Road, Longgang District, Shenzhen, Guangdong, 518116, China

KVANCE TECHNOLOGY CO.,LTD 2023.01.12 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR EUT NAME: Wireless Earphone Trademark: KVANCE MODEL : BTW92, BTW92C FCC ID : 2AML5-BTW92 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 : Levy Xie / Manager Contact information / address: 4 floor, Building A, No. 103, Baonan Road, Longgang District, Shenzhen, Guangdong, 518116, China

KVANCE TECHNOLOGY CO.,LTD 2023.01.12 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 : Levy Xie / Manager Contact information / address: 4 floor, Building A, No. 103, Baonan Road, Longgang District, Shenzhen, Guangdong, 518116, China

External Photos

Size:10*5mm Wireless Earphone FCC ID: 2AML5-BTW92 Label location

Internal Photos Antenna

RF EXPOSURE EVALUATION METHOD FCC ID: 2AML5-BTW92 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 Modulation Test Channel Output Power (dBm) Limit (dBm) GFSK Low -4.57 21 GFSK Middle -3.6 21 GFSK High -3.69 21 π/4DQPSK Low -3.72 21 π/4DQPSK Middle -2.84 21 π/4DQPSK High -2.81 21 max possible output power (PK,conducted)：-2±1dBm 1.9dBi logarithmic terms convert to numeric result is nearly 1.55 -1dBm=0.79mW 2402MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 0.79/5*√2.402=0.245≤3.0 2441MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 0.79/5*√2.441=0.247≤3.0 2480MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 0.79/5*√2.48=0.249≤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.

5F., No. 83, Kewang Rd., Longtan Dist., Taoyuan City 32556, Taiwan (R.O.C.) Tel: 886-3-4072728焋Fax: 886-3-4072738 焋[email protected] 1 © Unictron Technologies Corp . All specifications subject to change without notice. www.sanav.com www.unictron.com Product Name: WiFi/Bluetooth Chip Antenna – CW201 Part Number: H2U34C1H1B0100 Features: zSupporting WiFi/Bluetooth, covering 2400 to 2500 MHz zSurface Mount zDimensions: 2.0 x 1.2 x 0.6 mm zHigh performance, small size. zRoHS & REACH Compliant Applications: zISM 2.4 GHz applications zZigBee/BLE applications zBluetooth earphone systems zHand-held devices when WiFi / Bluetooth functions are needed, e.g., Smart phones zIEEE802.11 b/g/n zWireless PCMCIA cards or USB dongles 5F., No. 83, Kewang Rd., Longtan Dist., Taoyuan City 32556, Taiwan (R.O.C.) Tel: 886-3-4072728焋Fax: 886-3-4072738 焋[email protected] 2 © Unictron Technologies Corp . All specifications subject to change without notice. www.sanav.com www.unictron.com WiFi/Bluetooth Chip Antenna MODEL: CW201 Version: A I. Specifications: Mechanical Specifications Dimensions (mm) 2.0(L) x 1.2 (W) x 0.6 (H) Material Ceramic Termination Ag (environmental Pb free) Environmental Conditions Operation Temperature ( o C) -40 ~ +85 Storage Temperature ( o C) -5 ~ +40 Relative Humidity 10 ~ 70 % Items Specifications Frequencies (MHz) 2400~2500 Efficiency (%) 59.2 Average Gain (dB) -2.3 Peak Gain (dBi) 1.9 Test Condition 40 x 20 mm² (Evaluation board) Impedance (ƻ) 50 Polarization Linear Polarization 5F., No. 83, Kewang Rd., Longtan Dist., Taoyuan City 32556, Taiwan (R.O.C.) Tel: 886-3-4072728焋Fax: 886-3-4072738 焋[email protected] 3 © Unictron Technologies Corp . All specifications subject to change without notice. www.sanav.com www.unictron.com II. Layout Guide: Solder Land Pattern: The solder land pattern (gold marking areas) is shown below. Recommendation on matching circuit will be provided according to customer’s installation conditions. Grounding Pin Signal Input Transmission Line with 50ƻ Impedance Characteristic Top View Bottom View 5F., No. 83, Kewang Rd., Longtan Dist., Taoyuan City 32556, Taiwan (R.O.C.) Tel: 886-3-4072728焋Fax: 886-3-4072738 焋[email protected] 4 © Unictron Technologies Corp . All specifications subject to change without notice. www.sanav.com www.unictron.com III. Mechanical Dimensions: a) Antenna Dimensions b) PIN Definition PIN 1 2 Soldering Pad Signal Input Tuning/Signal Output TOP View Bottom View Side View Unit: mm Unit: mm 5F., No. 83, Kewang Rd., Longtan Dist., Taoyuan City 32556, Taiwan (R.O.C.) Tel: 886-3-4072728焋Fax: 886-3-4072738 焋[email protected] 5 © Unictron Technologies Corp . All specifications subject to change without notice. www.sanav.com www.unictron.com c) Test Board with Antenna Unit: mm 5F., No. 83, Kewang Rd., Longtan Dist., Taoyuan City 32556, Taiwan (R.O.C.) Tel: 886-3-4072728焋Fax: 886-3-4072738 焋[email protected] 6 © Unictron Technologies Corp . All specifications subject to change without notice. www.sanav.com www.unictron.com IV. Properties: a) Return loss (dB) b) Efficiency (%) 5F., No. 83, Kewang Rd., Longtan Dist., Taoyuan City 32556, Taiwan (R.O.C.) Tel: 886-3-4072728焋Fax: 886-3-4072738 焋[email protected] 7 © Unictron Technologies Corp . All specifications subject to change without notice. www.sanav.com www.unictron.com c)Average Gain (dB) d)Peak Gain (dBi) 5F., No. 83, Kewang Rd., Longtan Dist., Taoyuan City 32556, Taiwan (R.O.C.) Tel: 886-3-4072728焋Fax: 886-3-4072738 焋[email protected] 8 © Unictron Technologies Corp . All specifications subject to change without notice. www.sanav.com www.unictron.com V.Antenna Radiation Pattern Measurement: The antenna radiation patterns are measured in Unictron’s 3D Anechoic Chamber. The measurement setup is as show below. Z Y X 5F., No. 83, Kewang Rd., Longtan Dist., Taoyuan City 32556, Taiwan (R.O.C.) Tel: 886-3-4072728焋Fax: 886-3-4072738 焋[email protected] 9 © Unictron Technologies Corp . All specifications subject to change without notice. www.sanav.com www.unictron.com 3D Radiation Gain Pattern 2450 MHz (unit: dBi) X Y Z Frequency Gain(dBi) 2400 0.90 2420 1.48 2440 1.90 2460 1.82 2480 1.63 2500 0.60 5F., No. 83, Kewang Rd., Longtan Dist., Taoyuan City 32556, Taiwan (R.O.C.) Tel: 886-3-4072728焋Fax: 886-3-4072738 焋[email protected] 10 © Unictron Technologies Corp . All specifications subject to change without notice. www.sanav.com www.unictron.com VI.Frequency tuning: System Matching Circuit Component Location Description Vendor Tolerance 1 N/C - - 2 5.0 pF (0402) MURATA ±0.05 pF 3 0.8 pF (0402) MURATA ±0.05 pF 4 2.7 pF (0201) MURATA ±0.05 pF DC Block 22 pF (0402) MURATA ±5% 1 3 2 DC Block 4 5F., No. 83, Kewang Rd., Longtan Dist., Taoyuan City 32556, Taiwan (R.O.C.) Tel: 886-3-4072728焋Fax: 886-3-4072738 焋[email protected] 11 © Unictron Technologies Corp . All specifications subject to change without notice. www.sanav.com www.unictron.com VII. Soldering conditions: Typical Soldering Profile for Lead-free Process VIII. Reminders for use of Unictron’s ceramic chip antennas: a) This chip antenna is made of ceramic materials which is relatively more rigid and brittle compared to circuit board materials. Furthermore, the length of this antenna is quite long. Bending of circuit board at the locations where chip antenna is mounted may cause the cracking of solder joints or antenna itself. b) Punching/cutting of the break-off tab of PCB panel may cause severe bending of the circuit board which may result in cracking of solder joints or chip antenna itself. Therefore break-off tab shall be located away from the installation site of chip antenna. c) Be cautious when ultrasonic welding process needs to be used near the locations where chip antennas are installed. Strong ultrasonic vibration may cause the cracking of chip antenna solder joints. 5F., No. 83, Kewang Rd., Longtan Dist., Taoyuan City 32556, Taiwan (R.O.C.) Tel: 886-3-4072728焋Fax: 886-3-4072738 焋[email protected] 12 © Unict…

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No.：BCTC/RF-EMC-005 Page 1 of 66 Edition：A.5 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2212257300E Applicant: KVANCE TECHNOLOGY CO.,LTD Product Name: Wireless Earphone Model/Type Ref.: BTW92 Tested Date: 2022-12-29 to 2023-01-05 Issued Date: 2023-01-05 Report No.: BCTC2212257300E No.：BCTC/RF-EMC-005 Page 2 of 66 Edition：A.5 FCC ID: 2AML5-BTW92 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: KVANCE Model/Type Ref.: BTW92 BTW92C Prepared For: KVANCE TECHNOLOGY CO.,LTD Address: 4 floor, Building A, No. 103, Baonan Road, Longgang District, Shenzhen, Guangdong, 518116, China Manufacturer: SHENZHEN SOUND BASS TECHNOLOGY CO.,LTD Address: 4 floor, Building B, No. 103, Baonan Road, Longgang District, Shenzhen, Guangdong, 518116, 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: 2022-12-29 Sample tested Date: 2022-12-29 to 2023-01-05 Issue Date: 2023-01-05 Report No.: BCTC2212257300E Test Standards: FCC Part15.247 ANSI C63.10-2013 Test Results: PASS Remark: This is Bluetooth Classic radio test report. Tested by: Approved by: Lei Chen/Project Handler Zero Zhou/Reviewer Report No.: BCTC2212257300E No.：BCTC/RF-EMC-005 Page 3 of 66 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 .......................................................................................................... 19 8. Radiated Band Emission Measurement And Restricted Bands Of Operation ..... 23 8.1 Block Diagram Of Test Setup .............................................................................. 23 8.2 Limit .................................................................................................................... 23 8.3 Test Procedure ................................................................................................... 24 8.4 EUT Operating Conditions .................................................................................. 24 8.5 Test Result .......................................................................................................... 25 9. Conducted Emission ........................................................................................... 26 9.1 Block Diagram Of Test Setup .............................................................................. 26 9.2 Limit .................................................................................................................... 26 9.3 Test Procedure ................................................................................................... 26 9.4 Test Result ................................................................................................…

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Report No.: BCTC2212257300E No.：BCTC/RF-EMC-005 Page 64 of 66 Edition：A.5 17. EUT Test Setup Photographs Conducted Emissions Photo Radiated Measurement Photos Report No.: BCTC2212257300E No.：BCTC/RF-EMC-005 Page 65 of 66 Edition：A.5