2BKHC-PX01Smart Ring

Attestation Statements (August 21, 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: 2BKHC-PX01) (Shenzhen Pinxi Technology Co., Ltd.), the undersigned, hereby authorize (NEWENERGYER LIMITED) to act as our designated U.S. agent for service of process, (Shenzhen Pinxi Technology 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: Shenzhen Pinxi Technology Co., Ltd. Contact Name: duansheng Zhao Address: 732, 7th Floor, Aohua Business Building, 148 Huarong Road, Dalang Street, Longhua District, Shenzhen, Guangdong Province Telephone No: 13538214502 Email: [email protected] FRN: 0035847367 Signature [duansheng Zhao] 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]

(Shenzhen Pinxi Technology Co., Ltd.) (August 21, 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: 2BKHC-PX01) [Shenzhen Pinxi Technology 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) duansheng Zhao (Shenzhen Pinxi Technology Co., Ltd.) (August 21, 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: 2BKHC-PX01) [Shenzhen Pinxi Technology 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) duansheng Zhao

Shenzhen Pinxi Technology Co., Ltd. Model Difference Data：August 21, 2024 Product description: Smart Ring Model name: PX01, PX02, PX03, PX04, PX05, PX06, PX07, PX08, PX09, PX10 Trade Name: N/A FCC ID: 2BKHC-PX01 All the model are the same circuit and RF module, only the name and appearance are different. Regards Sincerely Client’s signature : Client’s name / title : duansheng Zhao（CEO） Contact information / address：732, 7th Floor, Aohua Business Building, 148 Huarong Road, Dalang Street, Longhua District, Shenzhen, Guangdong Province

Shenzhen Pinxi Technology Co., Ltd. (August 21, 2024) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Smart Ring / PX01, PX02, PX03, PX04, PX05, PX06, PX07, PX08, PX09, PX10 / FCC ID: 2BKHC-PX01) 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: duansheng Zhao Title: CEO

Shenzhen Pinxi Technology Co., Ltd. (August 21, 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: duansheng Zhao Title: CEO

Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 4 Model: PX01 External Photos Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 4 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 3 of 4 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 4 of 4

FCC ID LABEL: Label Location: FCC ID: 2BKHC-PX01 Model No.: PX01

Shenzhen CTB Testing Co., Ltd. FCC ID: 2BKHC-PX01 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. BLE: 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 1.511 1.42 1±1 2.00 1.58 <5 0.49127 3.00 YES 2.44 1.519 1.42 1±1 2.00 1.58 <5 0.49514 3.00 YES 2.480 1.049 1.27 1±1 2.00 1.58 <5 0.49918 3.00 YES GFSK Conclusion: For the max result : 0.49918≤ FCC Limit 3.0 for 1g SAR.

P/N: HLX321605A6 SymbolsLWTA Dimensions3.2+/-0.21.6+/-0.20.5+/-0.10.4+/-0.1 NumberTerminal Name ① INPUT ② NC Dimensions（Unit：mm） L w ①② T ( Side View ) ( Bottom View ) ( Top View ) A Features 1.Surface Mounted Devices with a small dimension of 3.6 x 1.6 x 0.5 mm 3 meet future miniaturization trend. 2.Embedded and LTCC (Low Temperature Co-fired Ceramic) technology is able to future integrate with system design as well as beautifying the housing of final product. 3.High Stability in Temperature / Humidity Change Applications 1.Bluetooth 2.Wireless LAN 3.ISM band 2.4GHz wireless applications 地址：深圳市宝安区西乡街道共乐社区铁仔路九方广场2栋1905 TEL: 0755-23591525, FAX: 0755-23591525 Evaluation Board and Matching Circuits Unit:mm 50ΩFeeding Line GND VIA πType Matching Network Clearance Area 6.0 1.25 2.25 0 . 7 4 0 . 7 4 1 . 8 3 . 3 4 3 . 7 7 1.0 1.63 5.0 5.6nH 0.5pF P/N: HLX321605A6 地址：深圳市宝安区西乡街道共乐社区铁仔路九方广场2栋1905 TEL: 0755-23591525, FAX: 0755-23591525 Electrical Characteristics Characteristic curve No. ItemSpecifications 1 Central Frequency2545MHz 2 Band Width 100 MHz typ. 3 Peak Gain 4.08dBi 4 Return Loss ≤2.0 5 Polarization Linear 6 Azimuth Beam width Omni-directional 7 Impedance 50 Ω P/N: HLX 321605 A6 地址：深圳市宝安区西乡街道共乐社区铁仔路九方广场2栋1905 TEL: 0755-23591525, FAX: 0755-23591525 Radiation Pattern coordinates： X-Z Plane X-Y Plane P/N: HLX321605A6 地址：深圳市宝安区西乡街道共乐社区铁仔路九方广场2栋1905 TEL: 0755-23591525, FAX: 0755-23591525 3D Radiation Pattern Frequency (MHz)240024502500 Avg. Gain (dBi)-1.91-1.30-1.48 Peck Gain (dBi)1.764.082.53 Efficiency (%)72.178.271.8 P/N: HLX321605A6 Y-Z Plane 地址：深圳市宝安区西乡街道共乐社区铁仔路九方广场2栋1905 TEL: 0755-23591525, FAX: 0755-23591525 Dependability Test Temperature range Relative Humidity range Operating Temperature range Storage Temperature range 25±5°C 55~75%RH -40°C~+85°C -40°C~+85°C Vibration Resist The device should fulfill the electrical specification after applied to the vibration of 10 to 55Hz with amplitude of 1.5mm for 2 hours each in X , Y and Z directions. Drop Shock The device should have no mechanical damage after dropping onto the hard wooden board from the height of 100cm for 3 times each facet of the 3 dimensions of the device. Solder Heat Proof The device should be satisfied after preheating at 120°C~150°C for 120 seconds and dipping in soldering Sn at 255°C+10°C for 5±0.5 seconds，or electric iron 300°C-10°C for 3±0.5 seconds， without damnify. Adhesive Strength of Termination The device have no remarkable damage or removal of the termination after horizontal force of 5N(≦0603)；10N(>0603)with 10±1 seconds. BendingResistTest Weld the product to the center part of the PCB with the thickness 1.6±0.2mm or 0.8±0.1mm as the illustration shows, and keep exerting force arrow-ward on it at speed of :1mm/S , and hold for 5±1S at the position of 1.5mm bending distance , so far , any peeling off of theproduct metal coating should not be detected . P/N: HLX321605A6 地址：深圳市宝安区西乡街道共乐社区铁仔路九方广场2栋1905 TEL: 0755-23591525, FAX: 0755-23591525 Moisture Proof The device should fulfill the electrical specification after exposed to the temperature 60±2°Cand the relative humidity 90~95% RH for 96 hours and 1~2 hours recovery time under normal condition. High Temperature Endurance The device should fulfill the electrical specification after exposed to temperature 85±5°Cfor 96±2 hours and 1~2 hours recovery time under normal temperature. Low Temperature Endurance The device should fulfill the electrical specification after exposed to the temperature -40°C±5°C for 96±2 hours and to 2 hours recovery time under normal temperature. Temperature Cycle Test The device should fulfill the electrical specification after exposed to the low temperature -40°C and high temperature +85°C for 30±2 min each by 5 cycles and 1 to 2 hours recovery time under normal temperature. Reflow Soldering Standard Condition P/N: HLX321605A6 地址：深圳市宝安区西乡街道共乐社区铁仔路九方广场2栋1905 TEL: 0755-23591525, FAX: 0755-23591525 Packaging and Dimensions (3216) Plastic Tape Remarks for Package Reserve a length of 150~200mm for the trailer of the carrier and 250~300 mm for the leader of the carrier and further 250mm of cover tape at the leading part of the carrier. Reel（3000 pcs/Reel） Storage Period Product should be used within six months of receipt. MSL 1 / Storage Temperature Range : <30 degree C, Humidity : <85%RH P/N: HLX321605A6 地址：深圳市宝安区西乡街道共乐社区铁仔路九方广场2栋1905 TEL: 0755-23591525, FAX: 0755-23591525

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: Smart Ring FCC ID: 2BKHC-PX01 Trademark: N/A Model Number: PX01, PX02, PX03, PX04, PX05, PX06, PX07, PX08, PX09, PX10 Prepared For: Shenzhen Pinxi Technology Co., Ltd. Address: 732, 7th Floor, Aohua Business Building, 148 Huarong Road, Dalang Street, Longhua District, Shenzhen, Guangdong Province Manufacturer: Shenzhen Pinxi Technology Co., Ltd. Address: 732, 7th Floor, Aohua Business Building, 148 Huarong Road, Dalang Street, Longhua District, Shenzhen, Guangdong Province 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: Aug. 13, 2024 Sample tested Date: Aug. 13, 2024 to Aug. 15, 2024 Issue Date: Aug. 15, 2024 Report No.: CTB240815058RFX 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.: CTB240815058RFX Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 35 TABLE OF CONTENT Test Report Declaration Page 1. VERSION .......................................................................................................................................... 3 2. TEST SUMMARY ............................................................................................................................. 4 3. MEASUREMENT UNCERTAINTY ................................................................................................... 5 4. PRODUCT INFORMATION AND TEST SETUP ............................................................................. 6 4.1 Product Information ............................................................................................................................ 6 4.2 Test Setup Configuration ................................................................................................................... 6 4.3 Support Equipment ............................................................................................................................ 6 4.4 Channel List ....................................................................................................................................... 7 4.5 Test Mode .......................................................................................................................................... 7 4.6 Test Environment ............................................................................................................................... 7 5. TEST FACILITY AND TEST INSTRUMENT USED ......................................................................... 8 5.1 Test Facility ........................................................................................................................................ 8 5.2 Test Instrument Used ......................................................................................................................... 8 6. AC POWER LINE CONDUCTED EMISSION .................................................................................. 11 6.1 Block Diagram Of Test Setup ........................................................................................................... 11 6.2 Limit .................................................................................................................................................. 11 6.3 Test procedure ................................................................................................................................. 11 6.4 Test Result ....................................................................................................................................... 13 7. RADIATED SPURIOUS EMISSION ............................................................................................... 15 7.1 Block Diagram Of Test Setup ........................................................................................................... 15 7.2 Limit .................................................................................................................................................. 15 7.3 Test procedure ................................................................................................................................. 16 7.4 Test Result ....................................................................................................................................... 17 8. BAND EDGE AND RF COUNDUCTED SPURIOUS EMISSIONS ................................................ 24 8.1 Block Diagram Of Test Setup ........................................................................................................... 24 8.2 Limit .................................................................................................................................................. 24 8.3 Test procedure ................................................................................................................................. 24 8.4 Test Result ....................................................................................................................................... 25 9. COUDUCTED OUTPUT POWER ................................................…

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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: PX01 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