2BKXW-CY601Bone Conduction Wireless Headphones

Attestation Statements (September 10, 2024) TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA RE: Attestation Statements Part 2.911(d)(7) request for FCC ID: 2BKXW-CY601 (Suzhou Denbom Electronic S&T Co.,Ltd), the undersigned, hereby authorize (NEWENERGYER LIMITED) to act as our designated U.S. agent for service of process, (Suzhou Denbom Electronic S&T 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 the equipment. (NEWENERGYER LIMITED) accepts the responsibility to act as designated U.S. agent for service of process, provides 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 the equipment. Applicant Information： Company name: Suzhou Denbom Electronic S&T Co.,Ltd Contact Name: Wang Xiaogang Address: 3rd FLoor, Building 2, No.415, Changyang Street, Suzhou Industrial Park, Jiangsu, China Telephone No: 13538214502 Email: [email protected] FRN: 0035929769 Signature [Wang Xiaogang] U.S. Agent Information: Company Name: NEWENERGYER LIMITED Address: 1818 S Patton Ct, Denver, CO, 80219 Contact Name: CHUN LIU Telephone No: 213 289 5042 Email: [email protected] FRN: 0034665885 Signature [CHUN LIU]

Suzhou Denbom Electronic S&T Co.,Ltd (September 10, 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: 2BKXW-CY601 [Suzhou Denbom Electronic S&T 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. Sincerely, (Applicant signature) (Applicant printed name) Wang Xiaogang Suzhou Denbom Electronic S&T Co.,Ltd (September 10, 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: 2BKXW-CY601 [Suzhou Denbom Electronic S&T 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. Sincerely, (Applicant signature) (Applicant printed name) Wang Xiaogang

Suzhou Denbom Electronic S&T Co.,Ltd (September 10, 2024) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Bone Conduction Wireless Headphones / CY601 / FCC ID: 2BKXW-CY601) 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 Exhibits Long-Term Confidentiality Short-Term Confidentiality NOTE 2 ID Label/Location No No Attestation Statement No No External Photos No ☐ Block Diagram ☒ ☐ Schematics ☒ ☐ Test Report No No Test Setup Photos No ☐ User’s Manual ☐ NOTE 1 ☒ Internal Photos ☐ NOTE 1 ☒ Parts List / Tune Up ☐ ☐ RF Exposure Info No No Operational Description ☒ ☐ Cover Letter(s) No No SDR Software / Security Info ☐ No required to be submitted with this application be permanently withheld from public review. Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. Please contact me if there is any information you may need. Sincerely, Signature: Name: Wang Xiaogang Title: Quality engineer

Suzhou Denbom Electronic S&T Co.,Ltd (September 10, 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 CTB Testing Technology 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, Signature: Name: Wang Xiaogang Title: Quality engineer

Shenzhen CTB Testing Technology Co., Ltd. Model: CY601 External Photos Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 3 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 3 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 3 of 3

FCC ID LABEL: Label Location: FCC ID: 2BKXW-CY601

Shenzhen CTB Testing Co., Ltd. FCC ID:2BKXW-CY601 Portable device According to §15.247(e)(i) and §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. According to KDB447498 D01 General RF Exposure Guidance V06 The 1-g SAR 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 When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. EDR: Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n SAR Exclusion threshold SAR test exclusion 2.402 1.857 1.53 1±1 2.00 1.58 <5 0.49127 3.00 YES 2.441 2.05 1.60 2±1 3.00 2.00 <5 0.62347 3.00 YES 2.480 2.386 1.73 2±1 3.00 2.00 <5 0.62843 3.00 YES 2.402 2.612 1.82 2±1 3.00 2.00 <5 0.61847 3.00 YES 2.441 2.871 1.94 2±1 3.00 2.00 <5 0.62347 3.00 YES 2.480 3.15 2.07 3±1 4.00 2.51 <5 0.79114 3.00 YES 2.402 3.052 2.02 3±1 4.00 2.51 <5 0.77860 3.00 YES 2.441 3.233 2.11 3±1 4.00 2.51 <5 0.78490 3.00 YES 2.480 3.541 2.26 3±1 4.00 2.51 <5 0.79114 3.00 YES GFSK π /4DQPSK 8DQPSK Conclusion: For the max result : 0.79114≤ FCC Limit 3.0 for 1g SAR.

Approval sheet Page 1 of 12 ASC_RFECA3216060A1T_V09 Aug. 2018 RFECA Series – RoHS Compliance CERAMIC ANTENNA Halogens Free Product 2.4 GHz ISM Band RF Application P/N: RFECA3216060A1T *Contents in this sheet are subject to change without prior notice. Approval sheet Page 2 of 12 ASC_RFECA3216060A1T_V09 Aug. 2018 FEATURES 1. Surface Mounted Devices with a small dimension of 3.2 X 1.6 X 0.6 mm 3 meet future miniaturization trend. 2. LTCC process. 3. High stability in Temperature / Humidity Change. 4. Superb performance to place on the middle of PCB edge and excellent peak/ average gain observed by field test application. APPLICATIONS 1. ISM Band 2.4GHz applications. 2. Bluetooth.. CONSTRUCTION DIMENSIONS Figure Symbol Dimension (mm) L 3.10 ± 0.20 W 1.60 ± 0.20 T 0.60 ± 0.10 A 0.25 ± 0.20 PINConnection 1 Feeding 2 Soldering terminal Approval sheet Page 3 of 12 ASC_RFECA3216060A1T_V09 Aug. 2018 SOLDER LAND PATTERN DESIGN Type-1: Empty Space 8.0mm x 3.0 mm Figure (Empty Space 8.0 mm x 3.0 mm) The limited size for ECA3216 is L>30mm and D>6mm Land Pattern TYPE-1 TEST BOARD ELECTRONIC CHARACTERISTICS *Note 1. Central Frequency should be defined after customers’ application approval. Item Specification Working Frequency Range 2.4GHz~2.4835GHz (Note-1) Gain 2 dBi (Typical) VSWR 2.0 max. Polarization Linear Azimuth Beamwidth Omni-directional Impedance 50 Power Capacity 3 W max. Maximum Input Power 5 Watts for 5 minutes Approval sheet Page 4 of 12 ASC_RFECA3216060A1T_V09 Aug. 2018 Type-2: Empty Space 6.3mm x 4.0 mm Figure (Empty Space 6.3 mm x 4.0 mm) The limited size for ECA3216 is L>30mm and D>6mm Land Pattern TYPE-2 TEST BOARD ELECTRONIC CHARACTERISTICS *Note 1. Central Frequency should be defined after customers’ application approval. Item Specification Working Frequency Range 2.4GHz~2.4835GHz (Note-1) Gain 2 dBi (Typical) VSWR 2.0 max. Polarization Linear Azimuth Beamwidth Omni-directional Impedance 50 Power Capacity 3 W max. Maximum Input Power 5 Watts for 5 minutes Approval sheet Page 5 of 12 ASC_RFECA3216060A1T_V09 Aug. 2018 Antenna on Type-1 Test Board ( Empty Space 8x3 mm &Thick ness 0.8mm) Antenna S11 on Type-1 Test Board Antenna VSWR on Type-1 Test Board 1.782 @ 2.40 GHz 1.328 @ 2.45 GHz 1.816 @ 2.50 GHz -11.0208 dB @ 2.40 GHz -17.0222 dB @ 2.45 GHz -10.7612 dB @ 2.50 GHz Approval sheet Page 6 of 12 ASC_RFECA3216060A1T_V09 Aug. 2018 Antenna on Type-2 Test Board ( Empty Space 6.3x4 mm &Thick ness 0.8mm) Antenna S11 on Type-2 Test Board Antenna VSWR on Type-2 Test Board 1.453 @ 2.40 GHz 1.216 @ 2.45 GHz 1.732 @ 2.50 GHz -14.6741 dB @ 2.40 GHz -20.2120 dB @ 2.45 GHz -11.4374 dB @ 2.50 GHz Approval sheet Page 7 of 12 ASC_RFECA3216060A1T_V09 Aug. 2018 RADIATION PATTERN Radiation Pattern and Gain were dependent on measurement board design. The specification of RFECA3216060A1T antenna was measured based on the PCB size and installation position as shown in the below figure Test Board. Antenna on Type-1 Test Board ZX plane ZY plane XY plane Frequency [MHz] Max Value [dB] Average [dB] Max Value [dB] Average [dB] Max Value [dB] Average [dB] 2400 0.29 -3.32 1.82 -0.51 1.49 -2.87 2450 0.55 -2.88 2.09 -0.21 1.95 -2.48 2500 -0.15 -3.44 1.82 -0.62 1.82 -2.73 Approval sheet Page 8 of 12 ASC_RFECA3216060A1T_V09 Aug. 2018 Antenna on Type-2 Test Board ZX plane ZY plane XY plane Frequency [MHz] Max Value [dB] Average [dB] Max Value [dB] Average [dB] Max Value [dB] Average [dB] 2400 1.57 -2.83 1.95 -0.76 1.10 -2.93 2450 1.70 -2.62 2.02 -0.62 1.57 -2.61 2500 1.46 -2.82 1.90 -0.71 1.75 -2.68 Approval sheet Page 9 of 12 ASC_RFECA3216060A1T_V09 Aug. 2018 RELIABILITY TEST Test item Test condition / Test method Specification Solderability JIS C 0050-4.6 JESD22-B102D *Solder bath temperature：235  5C *Immersion time：2  0.5 sec Solder：Sn3Ag0.5Cu for lead-free At least 95% of a surface of each terminal electrode must be covered by fresh solder. Leaching (Resistance to dissolution of metallization) IEC 60068-2-58 *Solder bath temperature：260  5C *Leaching immersion time：30  0.5 sec Solder : SN63A Loss of metallization on the edges of each electrode shall not exceed 25%. Resistance to soldering heat JIS C 0050-5.4 *Preheating temperature：120~150°C, 1 minute. *Solder temperature：2705C *Immersion time：101 sec Solder：Sn3Ag0.5Cu for lead-free Measurement to be made after keeping at room temperature for 242 hrs No mechanical damage. Electrical specification shall satisfy the descriptions in electrical characteristics under the operational temperature range within -40 ~ 85°C. Loss of metallization on the edges of each electrode shall not exceed 25%. Drop Test JIS C 0044 Customer’s specification. *Height：75 cm *Test Surface：Rigid surface of concrete or steel. *Times：6 surfaces for each units；2 times for each side. No mechanical damage. Electrical specification shall satisfy the descriptions in electrical characteristics under the operational temperature range within -40 ~ 85°C. Vibration JIS C 0040 *Frequency：10Hz~55Hz~10Hz(1min) *Total amplitude：1.5mm *Test times：6hrs.(Two hrs each in three mutually perpendicular directions) No mechanical damage. Electrical specification shall satisfy the descriptions in electrical characteristics under the operational temperature range within -40 ~ 85°C. Adhesive Strength of Termination JIS C 0051- 7.4.3 *Pressurizing force： 5N(≦0603)；10N(>0603) *Test time：10±1 sec No remarkable damage or removal of the termination. Approval sheet Page 10 of 12 ASC_RFECA3216060A1T_V09 Aug. 2018 Bending test JIS C 0051- 7.4.1 The middle part of substrate shall be pressurized by means of the pressurizing rod at a rate of about 1 mm/s per second until the deflection becomes 1mm/s and then pressure shall be maintained for 51 sec. Measurement to be made after keeping at room temperature for 242 hours No mechanical damage. Electrical specification shall satisfy the descriptions in electrical characteristics under the operational temperature range within -40 ~ 85°C. Temperature cycle JIS C 0025 1. 30…

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TEST REPORT Compiled by: Reviewed by: Approved by: Zhou Kui Arron Liu Bin Mei / Director Note: If there is any objection to the inspection results in this report, please submit a written report to the company within 15 days from the date of receiving the report. 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 CTB Testing Technology Co., Ltd. this report can’t be reproduced except in full. The tested sample(s) and the sample information are provided by the client. “*” indicates the testing items were fulfilled by subcontracted lab. “#” indicates the items are not in CNAS accreditation scope. Product Name: Bone Conduction Wireless Headphones FCC ID: 2BKXW-CY601 Trademark: 劲豆/VCCOR Model Number: CY601 Prepared For: Suzhou Denbom Electronic S&T Co.,Ltd Address: 3rd FLoor, Building 2, No.415, Changyang Street, Suzhou Industrial Park, Jiangsu, China Manufacturer: Suzhou Denbom Electronic S&T Co.,Ltd Address: 3rd FLoor, Building 2, No.415, Changyang Street, Suzhou Industrial Park, Jiangsu, China Prepared By: Shenzhen CTB Testing Technology Co., Ltd. Address: 1&2/F., Building A, No.26, Xinhe Road, Xinqiao, Xinqiao Street, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: Sep. 02, 2024 Sample tested Date: Sep. 02, 2024 to Sep. 06, 2024 Issue Date: Sep. 06, 2024 Report No.: CTB240906052RFX Test Standards FCC CFR Title 47 Part 15 Subpart C Section 15.247 ANSI C63.10:2013 Test Results PASS Remark: This is Bluetooth radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB240906052RFX Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 56 TABLE OF CONTENT Test Report Declaration Page 1. VERSION .......................................................................... 4 2. TEST SUMMARY ................................................................... 5 3. MEASUREMENT UNCERTAINTY ..................................................... 6 4. PRODUCT INFORMATION AND TEST SETUP ......................................... 7 4.1 Product Information ................................................................... 7 4.2 Test Setup Configuration ............................................................... 7 4.3 Support Equipment.................................................................... 7 4.4 Channel List ......................................................................... 8 4.5 Test Mode ........................................................................... 8 4.6 Test Environment ..................................................................... 8 5. TEST FACILITY AND TEST INSTRUMENT USED ....................................... 9 5.1 Test Facility .......................................................................... 9 5.2 Test Instrument Used .................................................................. 9 6. AC POWER LINE CONDUCTED EMISSION ............................................ 12 6.1 Block Diagram Of Test Setup .......................................................... 12 6.2 Limit ............................................................................... 12 6.3 Test procedure ...................................................................... 12 6.4 Test Result ......................................................................... 14 7. RADIATED SPURIOUS EMISSION ................................................... 16 7.1 Block Diagram Of Test Setup .......................................................... 16 7.2 Limit ............................................................................... 16 7.3 Test procedure ...................................................................... 17 7.4 Test Result ......................................................................... 18 8. BAND EDGE AND RF COUNDUCTED SPURIOUS EMISSIONS .......................... 27 8.1 Block Diagram Of Test Setup .......................................................... 27 8.2 Limit ............................................................................... 27 8.3 Test procedure ...................................................................... 27 8.4 Test Result ......................................................................... 28 9. COUDUCTED PEAK OUTPUT POWER ............................................... 35 9.1 Block Diagram Of Test Setup .......................................................... 35 9.2 Limit ............................................................................... 35 9.3 Test procedure ...................................................................... 35 9.4 Test Result ......................................................................... 35 10. 20DB OCCUPIED BANDWIDTH ..................................................... 39 10.1 Block Diagram Of Test Setup ......................................................... 39 10.2 Limit .............................................................................. 39 10.3 Test procedure ..................................................................... 39 10.4 Test Result ........................................................................ 39 11. CARRIERFREQUENCIES SEPARATION ............................................. 43 11.1 Block Diagram Of Test Setup ......................................................... 43 11.2 Limit .............................................................................. 43 11.3 Test procedure ..................................................................... 43 11.4 Test Result ........................................................................ 43 12. HOPPING CHANNEL NUMBER ..................................................... 47 12.1 Block Diagram Of Test Setup ......................................................... 47 12.2 Limit .............................................................................. 47 12.3 Test procedure ...................…

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Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 2 Model: CY601 Radiated Emission Below 1G Above 1G Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 2 Conducted emissions