2BB6B-AF01KEEP WARM

How to download APP? 1. Scan QR code below to download APP 2. Seach " Keep Warm " on phone APP store GOOGLE PLAY Keep Warm FCC COMP LIANCE STATEMENT: 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. 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, whic h 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. Warning: Ch anges or modifications to this unit not expressly approved by the part responsible fo r compliance could void the user’s authority to operate the equipment. FCC Radia tion Exposure Statement The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposur e condition without restriction.

Huaxin (Dongguan) Technology Co., Ltd. 2.911 (d)(5)(i) Equipment Type Attestation v1.2 Section 2.911(d)(5)(i) Certification – Equipment Type Company name: Huaxin (Dongguan) Technology Co., Ltd. Address: Room 801, Building 4, No. 6, Yongsheng North Road, Fenggang, Dongguan City, Guangdong Province Product Name: KEEP WARM FCC ID: 2BB6B-AF01 Model(s): AF-01,AF-02,AF-03,AF-04,AF-05,AF-06,AF-07,AF-08,AF-09,AF-10,AF-11,AF-12,AF-13,AF-14,AF-15, AF-16,AF-17,AF-18,AF-19,AF-20,AF-21,AF-22,AF-23,AF-24,AF-25,AF-26,AF-28,AF-29,AF-30 2.911(d)(5)(i) Equipment Type We, [Huaxin (Dongguan) Technology Co., Ltd.] certify that the equipment for which authorization is sought through certification is not:  Prohibited from receiving an equipment authorization pursuant to § 2.903; of the FCC rules.  Identified as an equipment type in the “Covered List” NOTE 1 Yours sincerely, Name: Yanguo Lin Date: Jul.26, 2023 Title and Company name: Manager / Huaxin (Dongguan) Technology Co., Ltd. NOTE 1 “Covered List”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

Huaxin (Dongguan) Technology Co., Ltd. 2.911 (d)(5)(ii) Applicant Attestation v1.2 Section 2.911(d)(5)(ii) Certification – Applicant (Covered List ) Company name: Huaxin (Dongguan) Technology Co., Ltd. Address: Room 801, Building 4, No. 6, Yongsheng North Road, Fenggang, Dongguan City, Guangdong Province Product Name: KEEP WARM FCC ID: 2BB6B-AF01 Model(s): AF-01,AF-02,AF-03,AF-04,AF-05,AF-06,AF-07,AF-08,AF-09,AF-10,AF-11,AF-12,AF-13,AF-14,AF-15, AF-16,AF-17,AF-18,AF-19,AF-20,AF-21,AF-22,AF-23,AF-24,AF-25,AF-26,AF-28,AF-29,AF-30 2.911(d)(5)(ii) Applicant filing We, [Huaxin (Dongguan) Technology Co., Ltd.] certify that, as of the date of the filing of the application, the applicant is not identified NOTE 1 on the “Covered List” NOTE 2 , established pursuant to § 1.50002 of this chapter, as an entity producing covered communications equipment. Yours sincerely, Name: Yanguo Lin Date: Jul.26, 2023 Title and Company name: Manager / Huaxin (Dongguan) Technology Co., Ltd. NOTE 1 Delete option not applicable to this application. NOTE 2 “Covered List”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

Huaxin (Dongguan) Technology Co., Ltd. 2.911 (d)(7)USA Agent v1.3 Section 2.911(d)(7) USA Agent for Service of Process Company name: Huaxin (Dongguan) Technology Co., Ltd. Address: Room 801, Building 4, No. 6, Yongsheng North Road, Fenggang, Dongguan City, Guangdong Province Product Name: KEEP WARM FCC ID: 2BB6B-AF01 Model(s): AF-01,AF-02,AF-03,AF-04,AF-05,AF-06,AF-07,AF-08,AF-09,AF-10,AF-11,AF-12,AF-13, AF-14,AF-15,AF-16,AF-17,AF-18,AF-19,AF-20,AF-21,AF-22,AF-23,AF-24,AF-25,AF-26, AF-28,AF-29,AF-30 2.911(d)(7) USA Designated Agent for Service of Process We, [Huaxin (Dongguan) Technology Co., Ltd.] (“the applicant”) designate [Electronic Mac, Inc.] NOTE1 for the purpose of accepting service of process on behalf of the applicant. Applicant consent: We Acknowledge our consent to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address of the designated agent and acknowledge our acceptance of our obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. Agent obligation: We Acknowledge our obligation to accept service of process in the United States for matters related to the applicable equipment at our physical U.S. address and email address for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. USA Agent Company name: Electronic Mac, Inc. Address: 6525 Crown Blvd, # 20805, San Jose, CA 95120 FRN: 0033414541 Contact Name: Ray Sia Telephone No: 408-332-2399 Email: [email protected] Applicant Company name: Huaxin (Dongguan) Technology Co., Ltd. Address: Room 801, Building 4, No. 6, Yongsheng North Road, Fenggang, Dongguan City, Guangdong Province FCC Grantee Code: 2BB6B Contact Name: Yanguo Lin Telephone No: 15007557294 Email: [email protected] Huaxin (Dongguan) Technology Co., Ltd. 2.911 (d)(7)USA Agent v1.3 Signature: Title: General Manager Signature: Title: manager Date: Jul.26, 2023 Date: Jul.26, 2023 NOTE 1: An applicant located in the United States may designate itself as the agent for service of process. Reference; Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-nation al-security-threats-to-the-communications-supply-chain-through-the

Huaxin (Dongguan) Technology Co., Ltd. Agent Authorization Company: Huaxin (Dongguan) Technology Co., Ltd. Address: Room 801, Building 4, No. 6, Yongsheng North Road, Fenggang, Dongguan City, Guangdong Province Product Name: KEEP WARM Model Number(s): AF-01,AF-02,AF-03,AF-04,AF-05,AF-06,AF-07,AF-08,AF- 09,AF-10,AF-11,AF-12,AF-13,AF-14,AF-15, AF-16,AF-17,AF-18,AF-19,AF-20,AF-21,AF-22,AF-23,AF-24,AF-25,AF-26,AF- 28,AF-29,AF-30 Product Description: KEEP WARM We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: Jul.26, 2023 Name: Yanguo Lin Title: Manager Company: Huaxin (Dongguan) Technology Co., Ltd.

Huaxin (Dongguan) Technology Co., Ltd. Family models declaration letter. Date: July 26, 2023 We Huaxin (Dongguan) Technology Co., Ltd. Product: KEEP WARM Model Name: AF-01 Serial Model: AF-02,AF-03,AF-04,AF-05,AF-06,AF-07,AF-08,AF-09,AF-10, AF-11,AF-12,AF-13,AF-14,AF-15,AF-16,AF-17,AF-18,AF-19,AF-20, AF-21,AF-22,AF-23,AF-24,AF-25,AF-26,AF-28,AF-29,AF-30 Difference description of series models: All the model are the same circuit and module, except the model names and colors. Thanks Sincerely Signature Name: Yanguo Lin Date: July 26, 2023 Title: Manager

Huaxin (Dongguan) Technology Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: July 26, 2023 Subject; Request for Confidentiality FCC ID: 2BB6B-AF01 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Software Security Requirements for UNII devices In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Yanguo Lin Title: Manager

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40mm*50mm Label

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FCC ID: 2BB6B-AF01 RF Exposure Evaluation TEST STANDARDS Follow the maximum permissible exposure (MPE) limits specified in 447498 D04 Interim General Radio Frequency Exposure Guidelines v01. The gain of the antenna used in the product was extracted from the supplied antenna data sheet and the maximum total power input to the antenna was also measured. Calculate the distance from the product to the MPE limit by the formula. LIMIT For single RF sources (i.e., any single fixed RF source, mobile device, or portable device, as defined in paragraph (b)(2) of this section): A single RF source is exempt if: (A) The available maximum time-averaged power is no more than 1 mW, regardless of separation distance. This exemption may not be used in conjunction with other exemption criteria other than those in paragraph (b)(3)(ii)(A) of Part 1.1307. Medical implant devices may only use this exemption and that in paragraph (b)(3)(ii)(A); (B) Or the available maximum time-averaged power or effective radiated power (ERP), whichever is greater, is less than or equal to the threshold Pth (mW) described in the following formula. This method shall only be used at separation distances (cm) from 0.5 centimeters to 40 centimeters and at frequencies from 0.3 GHz to 6 GHz (inclusive). Pth is given by: (C) Or using below table and the minimum separation distance (R in meters) from the body of a nearby person for the frequency (f in MHz) at which the source operates, the ERP (watts) is no more than the calculated value prescribed for that frequency. For the exemption in Table 1 to apply, R must be at least λ/2π, where λ is the free-space operating wavelength in meters. If the ERP of a single RF source is not easily obtained, then the available maximum time-averaged power may be used in lieu of ERP if the physical dimensions of the radiating structure(s) do not exceed the electrical length of λ/4 or if the antenna gain is less than that of a half-wave dipole (1.64 linear value). FCC ID: 2BB6B-AF01 For multiple RF sources: Multiple RF sources are exempt if: (A) The available maximum time-averaged power of each source is no more than 1 mW and there is a separation distance of two centimeters between any portion of a radiating structure operating and the nearest portion of any other radiating structure in the same device, except if the sum of multiple sources is less than 1 mW during the time-averaging period, in which case they may be treated as a single source (separation is not required). This exemption may not be used in conjunction with other exemption criteria other than those is paragraph (b)(3)(i)(A) of Part 1.1307. Medical implant devices may only use this exemption and that in paragraph (b)(3)(i)(A). (B) in the case of fixed RF sources operating in the same time-averaging period, or of multiple mobile or portable RF sources within a device operating in the same time averaging period, if the sum of the fractional contributions to the applicable thresholds is less than or equal to 1 as indicated in the following equation. Where: a = number of fixed, mobile, or portable RF sources claiming exemption using paragraph (b)(3)(i)(B) of Part 1.1307 for Pth, including existing exempt transmitters and those being added. b = number of fixed, mobile, or portable RF sources claiming exemption using paragraph (b)(3)(i)(C) of Part 1.1307 for Threshold ERP, including existing exempt transmitters and those being added. c = number of existing fixed, mobile, or portable RF sources with known evaluation for the specified minimum distance including existing evaluated transmitters. Pi = the available maximum time-averaged power or the ERP, whichever is greater, for fixed, mobile, or portable RF source i at a distance between 0.5 cm and 40 cm (inclusive). Pth,i = the exemption threshold power (Pth) according to paragraph (b)(3)(i)(B) of this section for fixed, mobile, or portable RF source i. FCC ID: 2BB6B-AF01 ERPj = the ERP of fixed, mobile, or portable RF source j. ERPth,j = exemption threshold ERP for fixed, mobile, or portable RF source j, at a distance of at least λ/2π according to the applicable formula of paragraph (b)(3)(i)(C) of Part 1.1307. Evaluatedk = the maximum reported SAR or MPE of fixed, mobile, or portable RF source k either in the device or at the transmitter site from an existing evaluation at the location of exposure. Exposure Limitk = either the general population/uncontrolled maximum permissible exposure (MPE) or specific absorption rate (SAR) limit for each fixed, mobile, or portable RF source k, as applicable from § 1.1310. Test Result of RF Exposure Evaluation Protocol Fre. (GHz) Output power (dBm) Tune-up power (dBm) Max tune-up power (dBm) ANT Gain ( dBi) Max EIRP (dBm) Max EIRP (mW) Separation distance (cm) Limit (mW) Result BLE 2.440 1.79 2±1 3 1.08 4.08 2.56 0.5 2.75 PASS Note: 1. This device is portable device. 2. The source of the evaluation data results is based on the test report ET-23070762E 3. The Maxinum power is less than the limit, complies with the exemption requirements.

2 Frequency(MHz) 2402 ~ 2480 MHz VSWR ≤ 1.92 Impedance 50 Ohm Nominal Return Loss -10 dB Max Radiation Omni-directional Gain (Peak) 1.08dBi Polarization Linear, Vertical Admitted Power 2W Connector Tin 3 Spectrum Detector: PK Test Date : June 8, 2013 Test By: An d y Temperature : 28°C Test Result: PASS Humidity : 55 % Modulation: GFSK Frequency VNA (MHz) E Total. dB(dB) 2400MHz 0.0403503 2410MHz 0.0886264 2420MHz 0.267381 2430MHz 0.193012 2440MHz 0.26366 2450MHz 0.0723139 2460MHz 0.36895 2470MHz 0.551525 2480MHz 0.640702 2490MHz 1.05232 2500MHz 1.08443 4 PHI 0 5 PHI 90 6 THETA 90 7 VSWR AND RETURN LOSS

Report No.: ET-23070741E This test report is valid for the tested samples only. It cannot be reproduced except in full without prior written consent of Shenzhen ETR Standard Technology Co., Ltd. TEST REPORT Applicant: Huaxin (Dongguan) Technology Co., Ltd. Address of Applicant: Room 801, Building 4, No. 6, Yongsheng North Road, Fenggang, Dongguan City, Guangdong Province Manufacturer/Factory: Huaxin (Dongguan) Technology Co., Ltd. Address of Manufacturer Room 801, Building 4, No. 6, Yongsheng North Road, Fenggang, Dongguan City, Guangdong Province Product Name: KEEP WARM Model No.: AF-01,AF-02,AF-03,AF-04,AF-05,AF-06,AF-07,AF-08,AF-09,AF-10, AF-11,AF-12,AF-13,AF-14,AF-15,AF-16,AF-17,AF-18,AF-19,AF-20, AF-21,AF-22,AF-23,AF-24,AF-25,AF-26,AF-28,AF-29,AF-30 Trade Mark: N/A FCC ID: 2BB6B-AF01 Applicable standards: FCC CFR Title 47 Part 15 Subpart C Section 15.247 Date of Test: Jul.03, 2023- Jul.19, 2023 Date of report issued: Jul.25, 2023 Test Result : PASS * Remark: * In the configuration tested, the EUT complied with the standards specified above. The results shown in this test report refer only to the sample(s) tested, this test report cannot be reproduced, except in full without prior written permission of the company. The report would be invalid without specific stamp of test institute and the signatures of compiler and approver Prepared By Shenzhen ETR Standard Technology Co., Ltd. Address: No.103, No.10, Phase I, Zone 3, Xinxing Industrial Park, Xinhe, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China Compiled by: Reviewed by: Approved by: Project Engineer Project Manager Authorized Signature - Page 2 of 31 - Report No.: ET-23070741E Tel:(86-755) 85259392 Email:[email protected] Web: www.etrlab.cn No.103, No.10, Phase I, Zone 3, Xinxing Industrial Park, Xinhe, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China Report Revision History Report No. Description Issue Date ET-23070741E Original Jul.25, 2023 - Page 3 of 31 - Report No.: ET-23070741E Tel:(86-755) 85259392 Email:[email protected] Web: www.etrlab.cn No.103, No.10, Phase I, Zone 3, Xinxing Industrial Park, Xinhe, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China Contents Page 1. TEST SUMMARY ......................................................................................................................................4 2. GENERAL INFORMATION .......................................................................................................................5 2.1 GENERAL DESCRIPTION OF EUT .................................................................................................................5 2.2 TEST MODE ................................................................................................................................................7 2.3 DESCRIPTION OF SUPPORT UNITS ...............................................................................................................7 2.4 DEVIATION FROM STANDARDS .....................................................................................................................7 2.5 ABNORMALITIES FROM STANDARD CONDITIONS ....................................................................................7 2.6 TEST FACILITY ............................................................................................................................................7 2.7 TEST LOCATION ..........................................................................................................................................7 2.8 ADDITIONAL INSTRUCTIONS .........................................................................................................................7 3. TEST INSTRUMENTS LIST ......................................................................................................................8 4. TEST RESULTS AND MEASUREMENT DATA .......................................................................................9 4.1 ANTENNA REQUIREMENT .............................................................................................................................9 4.2 CONDUCTED EMISSIONS ...........................................................................................................................10 4.3 CONDUCTED PEAK OUTPUT POWER ..........................................................................................................13 4.4 6DB BANDWIDTH ......................................................................................................................................14 4.5 POWER SPECTRAL DENSITY ......................................................................................................................16 4.6 BAND EDGES ............................................................................................................................................18 Conducted Emission Method ...................................................................................................................18 Radiated Emission Method ......................................................................................................................19 4.7 SPURIOUS EMISSION .................................................................................................................................21 Conducted Emission Method ...................................................................................................................21 Radiated Emission Method ......................................................................................................................23 5. TEST SETUP PHOTO .............................................................................................................................31 6. EUT CONSTRUCTIONAL DETAILS .......................................................................................................31 - Page 4 of 31 - Report No.: ET-23070741E Tel:(86-755) 85259392 Email:[email protected] Web: www.etrlab.cn No.103, …

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ET-23070741 Page 1 of 2 Product Name: KEEP WARM Test Model No.: AF-01 Test Setup Photo Radiated emissions 30MHz to1GHz Above 1GHz ET-23070741 Page 2 of 2 Conducted Emission ------End------