2A6LK-M1Visual dental floss

Shenzhen Meihua Antai Technoloay Co., Ltd. Add: Room 201,No.71-7,Xintian Avenue, Xintian Community,Fuhai Street, Bao'an District, Shenzhen, China Date: 2022-4-22 FCC ID: 2A6LK-M1 Dear Sir/Madam, We, Shenzhen Meihua Antai Technoloay Co., Ltd. Hereby declares the following statement for Federal Communications Commission, PCB board, circuit, structure and internal of these model(s) are the same, Only model number is different for these model: Product name: Visual dental floss Model no.: M1, M2, M3, M4, M5, M6, M7, M8, M9, MPRO, X1, X2, X3, X4, X5, X6, X7, X8, X9, XPRO Sincerely, Name/Title： Wei Li/Manager Company: Shenzhen Meihua Antai Technoloay Co., Ltd. Address: Room 201,No.71-7,Xintian Avenue, Xintian Community,Fuhai Street, Bao'an District, Shenzhen, China Phone: 13189709310 Fax: N/A E-Mail: [email protected]

CONFIDENTIALITY REQUEST for Certification Service in USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21046 Date:<2022-4-22> Pursuant to Paragraphs §0.457 and 0.459 of the Commission’s Rules (47 C.F.R.) and Section §552(b)(4) of the Freedom of Information Act, we requests confidentiality for the following products: FCC ID Model name 2A6LK-M1 M1 For the product stated above, we request that the following information be held confidential; Exhibits Long-Term Confidentiality Short-Term Confidentiality Short-Term Confidentiality Days External Photos Internal Photos Block Diagram Schematics Test Setup Photos User’s Manual Parts List Tune Up Operational Descriptions The long-term confidentiality exhibits contain our trade secrets and proprietary information that could be of benefit to our competitors. The short-term confidentiality on the basis of ensuring that business sensitive information remains confidential until the actual marketing of our new device. If you have any questions, please feel free to contact me at the address shown below. Sincerely, Name/Title： Wei Li/Manager Company: Shenzhen Meihua Antai Technoloay Co., Ltd. Address: Room 201,No.71-7,Xintian Avenue, Xintian Community,Fuhai Street, Bao'an District, Shenzhen, China Phone: 13189709310 Fax: N/A E-Mail: [email protected]

Shenzhen Meihua Antai Technoloay Co., Ltd. Room 201,No.71-7,Xintian Avenue, Xintian Community,Fuhai Street, Bao'an District, Shenzhen, China Date: 2022-4-22 FCC ID: 2A6LK-M1 Model Number: M1 To: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD To Whom It May Concern, We, Shenzhen Meihua Antai Technoloay Co., Ltd., declare that this EUT (FCC ID: 2A6LK-M1) doesn’t have Ad Hoc mode function on “non-US/Canada frequencies”. In addition. The frequency selection feature is disabled by firmware for devices marked to the US/Canada. For DTS part of this device, only channels 1-11 will be used in North America, Country code selection is disabled. Should you have any questions or comments regarding this matter, please have my best attention. Sincerely, Name/Title： Wei Li/Manager Company: Shenzhen Meihua Antai Technoloay Co., Ltd. Address: Room 201,No.71-7,Xintian Avenue, Xintian Community,Fuhai Street, Bao'an District, Shenzhen, China Phone: 13189709310 Fax: N/A E-Mail: [email protected]

Shenzhen Meihua Antai Technoloay Co., Ltd. Room 201,No.71-7,Xintian Avenue, Xintian Community,Fuhai Street, Bao'an District, Shenzhen, China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 2022-4-22 To whom it may concern: We, Shenzhen Meihua Antai Technoloay Co., Ltd. the undersigned, hereby authorize Eurofins Product Service GmbH to act on our behalf in all matters relating to applications for equipment authorization FCC ID: 2A6LK-M1 including the signing of all documents related to these matters. Any and all acts carried out by Eurofins Product Service GmbH on our behalf shall have the same effect as acts of our own. We also hereby certify that no party to this application is subject to a denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. Sincerely, Name/Title： Wei Li/Manager Company: Shenzhen Meihua Antai Technoloay Co., Ltd. Address: Room 201,No.71-7,Xintian Avenue, Xintian Community,Fuhai Street, Bao'an District, Shenzhen, China Phone: 13189709310 Fax: N/A E-Mail: [email protected]

FCC ID: 2A6LK-M1 External Photos of the EUT FCC ID: 2A6LK-M1 FCC ID: 2A6LK-M1

FCC ID: 2A6LK-M1 Label and Location Size: L: 2.0cm*W: 0.5cm Label and Location FCC ID: 2A6LK-M1

FCC ID: 2A6LK-M1 Internal Photos of the EUT FCC ID: 2A6LK-M1 Antenna

RF Exposure evaluation FCC ID: 2A6LK-M1 1.1. Applicable Standard According to §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 §1.1310 and §2.1093 RF exposure requirement KDB447498 v06: Mobile and Portable Devices RF Exposure Procedures and Equipment Authorization Policies 1.2. Requirement According to KDB447498 D01 General RF Exposure Guidance v06 Section 4.3.1 Standalone SAR test exclusion considerations: “Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition, listed below, is satisfied. These test exclusion conditions are based on source-based time-averaged maximum conducted output power of the RF channel requiring evaluation, adjusted for tune-up tolerance, and the minimum test separation distance required for the exposure conditions.22 The minimum test separation distance is determined by the smallest distance from the antenna and radiating structures or outer surface of the device, according to the host form factor, exposure conditions and platform requirements, to any part of the body or extremity of a user or bystander (see 5) of section 4.1). To qualify for SAR test exclusion, the test separation distances applied must be fully explained and justified by the operating configurations and exposure conditions of the transmitter and applicable host platform requirements, typically in the SAR measurement or SAR analysis report, according to the required published RF exposure KDB procedures. When no other RF exposure testing or reporting is required, a statement of justification and compliance must be included in the equipment approval, in lieu of the SAR report, to qualify for the SAR test exclusion. When required, the device specific conditions described in the other published RF exposure KDB procedures must be satisfied before applying these SAR test exclusion provisions; for example, handheld PTT two-way radios, handsets, laptops & tablets etc.23 “ [(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 • 3.0 and 7.5 are referred to as the numeric thresholds in the step 2 below 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 according to 5) in section 4.1 is applied to determine SAR test exclusion. 1.3. Manufacturing tolerance 802.11b (Peak) Channel Channel 01 Channel 06 Channel 11 Target (dBm) 7.0 8.0 8.5 Tolerance ±(dB) 1.0 1.0 1.0 802.11g (Peak) Channel Channel 01 Channel 06 Channel 11 Target (dBm) 7.0 7.0 7.5 Tolerance ±(dB) 1.0 1.0 1.0 802.11n(HT20) (Peak) Channel Channel 01 Channel 06 Channel 11 Target (dBm) 6.0 7.0 8.0 Tolerance ±(dB) 1.0 1.0 1.0 Page 2 of 2 2. E v a l u a t i o n R e s u l t Evaluation Results Band/Mode f (GHz) Antenna Distance (mm) RF output power (including tune-up tolerance) SAR Test Exclusion Threshold SAR Test Exclusion dBm mW 2.4GWIFI 2.5 5 9.5 8.9125 2.8184<3.0 Yes 3. C o n c l u s i o n The measurement results comply with the FCC Limit per 47 CFR 2.1093 for the uncontrolled RF Exposure and SAR Exclusion Threshold per KDB 447498 v06 .....................End of Report.........................

Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao‘an District, Shenzhen, China Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn FCC PART 15 SUBPART C TEST REPORT FCC PART 15.247 Report Reference No. ..................... : FCC ID............................................. : CTA22040600401 2A6LK-M1 Compiled by ( position+printed name+signature) . : File administrators Kevin Liu Supervised by ( position+printed name+signature) . : Project Engineer Kevin Liu Approved by ( position+printed name+signature) . : RF Manager Eric Wang Date of issue .................................... : Apr. 15, 2022 Testing Laboratory Name .............. : Shenzhen CTA Testing Technology Co., Ltd. Address............................................ : Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Applicant’s name ............................ : Shenzhen Meihua Antai Technoloay Co., Ltd. Address ............................................ : Room 201, No.71-7, Xintian Avenue, Xintian Community, Fuhai Street, Bao’an District, Shenzhen, China Test specification ........................... : Standard ........................................... : FCC Part 15.247 TRF Originator .................................. : Shenzhen Global Test Service Co.,Ltd. Shenzhen CTA Testing Technology Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen CTA Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTA Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description ..................... : Visual dental floss Trade Mark ....................................... : N/A Manufacturer .................................... : Shenzhen Meihua Antai Technoloay Co., Ltd. Model/Type reference ...................... : M1 Listed Models .................................. : M2, M3, M4, M5, M6, M7, M8, M9, MPRO, X1, X2, X3, X4, X5, X6, X7, X8, X9, XPRO Modulation Type ............................... : CCK/DSSS/ OFDM Operation Frequency ........................ : From 2412 - 2462MHz Rating ............................................... : DC 3.70V From external circuit and DC 5V From adapter Result ............................................... : PASS Report No.: CTA22040600401 Page 2 of 40 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn T E S T R E P O R T Equipment under Test : Visual dental floss Model /Type : M1 Series Model No. M2, M3, M4, M5, M6, M7, M8, M9, MPRO, X1, X2, X3, X4, X5, X6, X7, X8, X9, XPRO Applicant : Shenzhen Meihua Antai Technoloay Co., Ltd. Address : Room 201, No.71-7, Xintian Avenue, Xintian Community, Fuhai Street, Bao’an District, Shenzhen, China Manufacturer : Shenzhen Meihua Antai Technoloay Co., Ltd. Address : Room 201, No.71-7, Xintian Avenue, Xintian Community, Fuhai Street, Bao’an District, Shenzhen, China Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: CTA22040600401 Page 3 of 40 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Contents 1 T E S T S T A N D A R D S .................................................................. 4 2 S U M M A R Y ............................................................................. 5 2.1 General Remarks 5 2.2 Product Description 5 2.3 Equipment Under Test 5 2.4 Short description of the Equipment under Test (EUT) 5 2.5 EUT operation mode 5 2.6 Block Diagram of Test Setup 6 2.7 Related Submittal(s) / Grant (s) 6 2.8 Modifications 6 3 T E S T E N V I R O N M E N T ............................................................... 7 3.1 Address of the test laboratory 7 3.2 Test Facility 7 3.3 Environmental conditions 7 3.4 Test Description 8 3.5 Statement of the measurement uncertainty 8 3.6 Equipments Used during the Test 9 4 T E S T C O N D I T I O N S A N D R E S U L T S ............................................ 10 4.1 AC Power Conducted Emission 10 4.2 Radiated Emission 13 4.3 Maximum Peak Conducted Output Power 20 4.4 Power Spectral Density 21 4.5 6dB Bandwidth 24 4.6 Out-of-band Emissions 27 4.7 Antenna Requirement 34 5 T E S T S E T U P P H O T O S O F T H E E U T .......................................... 35 6 P H O T O S O F T H E E U T ............................................................. 36 Report No.: CTA22040600401 Page 4 of 40 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 1 T E S T S T A N D A R D S The tests were performed according to following standards: FCC Rules Part 15.247: Frequency Hopping, Direct Spread Spectrum and Hybrid Systems that are in operation within the bands of 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz. ANSI C63.10-2013: American National Standard for Testing Unlicensed Wireless Devices KDB558074 D01 v05r02: Guidance for Compliance Measurements on Digital Transmission Systems (DTS) ,Frequency Hopping Spread Spectrum System(HFSS), and Hybrid Sy…

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Report No.: CTA22040600401 Page 30 of 40 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 802.11g Reference Reference CH06 CH11 30MHz-1GHz 30MHz-1GHz 1GHz -25GHz 1GHz -25GHz Report No.: CTA22040600401 Page 31 of 40 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 802.11n20 Reference Reference CH01 CH06 30MHz-1GHz 30MHz-1GHz 1GHz -25GHz 1GHz -25GHz Report No.: CTA22040600401 Page 32 of 40 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 802.11n20 Reference CH11 30MHz-1GHz 1GHz -25GHz Report No.: CTA22040600401 Page 33 of 40 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Band-edge Measurements for RF Conducted Emissions: 802.11b Left bandedge Right bandedge 802.11g Left bandedge Right bandedge 802.11n(HT20) Left bandedge Right bandedge Report No.: CTA22040600401 Page 34 of 40 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 4.7 Antenna Requirement Standard Applicable For intentional device, according to FCC 47 CFR Section 15.203: An intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device. The use of a permanently attached antenna or of an antenna that uses a unique coupling to the intentional radiator, the manufacturer may design the unit so that a broken antenna can be replaced by the user, but the use of a standard antenna jack or electrical connector is prohibited FCC CFR Title 47 Part 15 Subpart C Section 15.247(c) (1) (I): (i) Systems operating in the 2400-2483.5 MHz band that is used exclusively for fixed. Point-to-point operations may employ transmitting antennas with directional gain greater than 6dBi provided the maximum conducted output power of the intentional radiator is reduced by 1 dB for every 3 dB that the directional gain of the antenna exceeds 6dBi. Test Result: The maximum gain of antenna was 0.0 dBi. Remark:The antenna gain is provided by the customer , if the data provided by the customer is not accurate, Shenzhen CTA Testing Technology Co., Ltd. does not assume any responsibility. Report No.: CTA22040600401 Page 35 of 40 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 5 T e s t S e t u p P h o t o s o f t h e E U T Report No.: CTA22040600401 Page 36 of 40 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 6 P h o t o s o f t h e E U T Report No.: CTA22040600401 Page 37 of 40 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Report No.: CTA22040600401 Page 38 of 40 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Report No.: CTA22040600401 Page 39 of 40 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Report No.: CTA22040600401 Page 40 of 40 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn ********************** End of Report ********************** Antenna

FCC ID: 2A6LK-M1 Test Setup Photos of the EUT