2AJJGHJRFHJ RF

HJ RF Module SPEC V1.0 Index 1. Summary ................................................................................................................................. 3 1.1 Functions ............................................................................................................................. 3 1.2 Application .......................................................................................................................... 3 2. Electrical characters ............................................................................................................... 4 3. Absolute Maximum Ratings .................................................................................................. 5 4. Pin assignment ....................................................................................................................... 6 4.1 pin distribution .............................................................................................................. 6 4.2 Pin definition ................................................................................................................. 6 5. Reference schematic ............................................................................................................. 7 6. Warning .................................................................................................................................... 8 7. The requirement for KDB 996369 D03: .............................................................................. 9 3 1. Summary 1.1 Functions Frequency band: 2405 ~ 2480MHz. FSK or GFSK modulation Low current consumption: RX 16mA, TX 20mA (at 0dBm output power). Low sleep current (1.5 uA). On chip regulator, support input voltage 2.0 ~ 3.6 V. Programmable data rate from 2Kbps to 500Kbps. Programmable TX power level from – 20 dBm to 1 dBm. Ultra High sensitivity: -95dBm at 500Kbps on-air data rate. -97dBm at 250Kbps on-air data rate -104dBm at 25Kbps on-air data rate -107dBm at 2Kbps on-air data rate Easy to use. Support 3-wire or 4-wire SPI. ONE register setting for new channel frequency. 8-bits Digital RSSI for clear channel indication. Fast exchange mode during TRX role switching. Auto RSSI measurement. Auto Calibrations. Auto IF function. Auto CRC Check. 1.2 Application Wireless keyboard and mice Remote control Helicopter and airplane radio controller 2400 ~ 2483.5 MHz ISM system Wireless metering and building automation Wireless toys and game controllers 4 2. Electrical characters Item Description Remark 1 EUT Name HJRF 2 EUT Function 2.4GHz Wireless Module 3 Operation Frequency 2405MHz-2480MHz 4 Modulation Technology FSK OR GFSK 5 Manufacturer Richmat 6 supply voltage 2.0-3.6V 7 Current consumption 1.5uA(RC OSC OFF,typical) @Sleep mode 0.3uA(RC OSC ON,typical) @Idle mode 1.9mA( typical) @Standby mode 9mA( typical) @PLL mode 16mA( typical) @RX mode 20mA( typical) @TX mode 8 Transmit output power 0 dBm 9 Rx sensitivity -95 dBm Data rate 500K -97 dBm Data rate 250K -104 dBm Data rate 25K -107 dBm Data rate 2K 10 Interface 6 pin 2mm header 11 Dimension 23*12.5 (mm) 12 Operating temperature -40 ~ 85°C 5 3. Absolute Maximum Ratings Parameter With respect to Rating Unit Supply voltage range (VDD) GND -0.3 ~ 3.6 V Digital IO pins range GND -0.3 ~ VDD+0.3 V Voltage on the analog pins range GND -0.3 ~ 2.1 V Input RF level 5 dBm Storage Temperature range -55 ~ 125 C ESD Rating HBM ± 2K V MM ± 100 V *Stresses above those listed under “Absolute Maximum Rating” may cause permanent damage to the device. These are stress ratings only; functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. *Device is ESD sensitive. Use appropriate ESD precautions. HBM (Human Body Mode) is tested under MIL-STD-883F Method 3015.7. MM (Machine Mode) is tested under JEDEC EIA/JESD22-A115-A. *Device is Moisture Sensitivity Level III (MSL 3) 6 4. Pin assignment 4.1 pin distribution 4.2 Pin definition Pin No. Symbol Function Description 1 GND Ground 2 SCS 3 wire SPI chip select 3 SCK 3 wire SPI clock input pin 4 SDIO 3 wire SPI read/writer data pin 5 GIO1 Multi-function GIO1/4-wire SPI data output 6 VCC RF Module Supply voltage input 7 5. Reference schematic 8 6. Warning 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. Caution: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 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, which 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. Information for the OEM Integrators This device is intended for OEM integrators…

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Qingdao Richmat Intelligence Technology Inc 053019-02a Request for Modular/Limited Modular Approval Date: February 19, 2021 Subject: Manufacturer’s Declaration for ☐ - Modular Approval ☐ - Split Modular Approval ☒ - Limited Modular Approval ☐ - Limited Split Modular Approval Confidentiality Request for: ______FCC ID: 2AJJGHJRF______ 8 Basic Requirements – FCC Part 15.212(a)(1) For Items Marked “NO(*)”, the Limited Module Description Must be Filled Out on the Following Pages Modular Approval Requirement Requirement Met 1. The modular transmitter must have its own RF shielding. This is intended to ensure that the module does not have to rely upon the shielding provided by the device into which it is installed in order for all modular transmitter emissions to comply with FCC limits. It is also intended to prevent coupling between the RF circuitry of the module and any wires or circuits in the device into which the module is installed. Such coupling may result in non-compliant operation. The physical crystal and tuning capacitors may be located external to the shielded radio elements. 15.212(a)(1)(i) ☐ - YES ☒ - NO(*) Details: The module has no shielding. 2. The modular transmitter must have buffered modulation/data inputs (if such inputs are provided) to ensure that the module will comply with FCC requirements under conditions of excessive data rates or over-modulation. 15.212(a)(1)(ii) ☒ - YES ☐ - NO(*) Details: All modulation and data inputs are buffered by circuitry on the transmitter chip U1, as is shown in the schematic. 3. The modular transmitter must have its own power supply regulation on the module. This is intended to ensure that the module will comply with FCC requirements regardless of the design of the power supplying circuitry in the device into which the module is installed. 15.212(a)(1)(iii) ☐ - YES ☒ - NO(*) Details: The module doesn’t contains its own power supply regulation. 4. The modular transmitter must comply with the antenna and transmission system requirements of §§ 15.203, 15.204(b), 15.204(c), 15.212(a), and 2.929(b). The antenna must either be permanently attached or employ a ‘‘unique’’ antenna coupler (at all connections between the module and the antenna, including the cable). The ‘‘professional installation’’ provision of § 15.203 is not applicable to modules but can apply to limited modular approvals under paragraph 15.212(b). 15.212(a)(1)(iv) ☒ - YES ☐ - NO(*) Details: The module connects to permanently attached antenna. 5. The modular transmitter must be tested in a stand-alone configuration, i.e., the module must not be inside another device during testing. This is intended to demonstrate that the module is capable of complying with Part 15 emission limits regardless of the device into which it is eventually installed. Unless the transmitter module will be battery powered, it must comply with the AC line conducted requirements found in Section 15.207. AC or DC power lines and data input/output lines connected to the module must not contain ferrites, unless they will be marketed with the module (see Section 15.27(a)). The length of these lines shall be length typical of actual use or, if that length is unknown, at least 10 centimeters to insure that there is no coupling between the case of the module and supporting equipment. Any accessories, peripherals, or support equipment connected to the module during testing shall be unmodified or commercially available (see Section 15.31(i)). 15.212(a)(1)(v) ☒ - YES ☐ - NO(*) Details: The module was tested in the hosts as shown in test setup photographs filed with this application. Qingdao Richmat Intelligence Technology Inc 053019-02a Modular Approval Requirement Requirement Met 6. The modular transmitter must be labeled with its own FCC ID number, or use an electron display (see KDB Publication 784748). If using a permanently affixed label with its own FCC ID number, if the FCC ID is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following: “Contains Transmitter Module FCC ID: XYZMODEL1” or “Contains FCC ID: XYZMODEL1.” Any similar wording that expresses the same meaning may be used. The Grantee may either provide such a label, an example of which must be included in the application for equipment authorization, or, must provide adequate instructions along with the module which explain this requirement. In the latter case, a copy of these instructions must be included in the application for equipment authorization. If the modular transmitter uses an electronic display of the FCC identification number, the information must be readily accessible and visible on the modular transmitter or on the device in which it is installed. If the module is installed inside another device, then the outside of the device into which the module is installed must display a label referring to the enclosed module. This exterior label can use wording such as the following: “Contains FCC certified transmitter module(s).” Any similar wording that expresses the same meaning may be used. The user manual must include instructions on how to access the electronic display. A copy of these instructions must be included in the application for equipment authorization. 15.212(a)(1)(vi) ☒ - YES ☐ - NO(*) Details: There is a label on the module as shown in the labeling exhibit filed with this application. Host specific labeling instructions are shown in the installation manual .filed with this application. 7. The modular transmitter must comply with all specific rule or operating requirements applicable to the transmitter, including all the conditions provided in the integration instructions by the grantee. A copy of these instructions must be included in the application for equipment authorization. For example, there are very strict operational and timing requireme…

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Qingdao Richmat Intelligence Technology Inc Authority to Act as Agent Date: _2021.1.26 American Certification Body, Inc. 6731 Whittier Avenue Suite C110 McLean, VA 22101 To Whom It May Concern: ______Intertek Testing Services Shanghai______ is authorized to act on our behalf, until otherwise notified, for applications to American Certification Body, Inc. (ACB). We certify that we are not subject to denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. Further, no party, as defined in 47 CFR 1.2002 (b), to the application is subject to denial of federal benefits, that includes FCC benefits. Thank you, Agency Agreement Expiration Date: _____2022.1.26_____ By: _____________ _____________ ____ Chongjie Yuan____ (Signature 1 ) (Print name) Title: _______ Certified engineer ___ On behalf of: _ Qingdao Richmat Intelligence Technology Inc (Company Name) Telephone: _____ _+86 15192777001___ 1 - Must be signed by applicant contact given for applicant on the FCC site, or by the authorized agent if an appropriate authorized agent letter has been provided. Letters should be placed on appropriate letterhead.

Qingdao Richmat Intelligence Technology Inc Request for Confidentiality Date: __2021.1.26______ Subject: Confidentiality Request for: ______2AJJGHJRF______ Pursuant to FCC 47 CFR 0.457(d) and 0.459 and IC RSP-100, Section 9.4, the applicant requests that a part of the subject FCC application be held confidential. Type of Confidentiality Requested Exhibit ☐ Short Term ☒ Permanent Block Diagrams ☐ Short Term External Photos ☐ Short Term ☐ Permanent * 1 Internal Photos ☐ Short Term ☒ Permanent Operation Description/Theory of Operation ☐ Short Term ☐ Permanent Parts List & Placement/BOM ☐ Short Term ☐ Permanent Tune-Up Procedure ☐ Short Term ☒ Permanent Schematics ☐ Short Term Test Setup Photos ☐ Short Term ☐ Permanent * 3 User’s Manual _____ Qingdao Richmat Intelligence Technology Inc _____ has spent substantial effort in developing this product and it is one of the first of its kind in industry. Having the subject information easily available to "competition" would negate the advantage they have achieved by developing this product. Not protecting the details of the design will result in financial hardship. Permanent Confidentiality: The applicant requests the exhibits listed above as permanently confidential be permanently withheld from public review due to materials that contain trade secrets and proprietary information not customarily released to the public. Short-Term Confidentiality: The applicant requests the exhibits selected above as short term confidential be withheld from public view for a period of ___(specify number of days not to exceed 180) 2 ___ days from the date of the Grant of Equipment Authorization and prior to marketing. This is to avoid premature release of sensitive information prior to marketing or release of the product to the public. Applicant is also aware that they are responsible to notify ACB in the event information regarding the product or the product is made available to the public before the requested period has expired. ACB will then release the documents listed above for public disclosure pursuant to FCC Public Notice DA 04-1705. Sincerely, By: __________________________ ___Chongjie Yuan_________ (Signature/Title 3 ) (Print name) 1 - The asterisked items (*) require further information to be provided to ACB before permanent confidentiality will be extended to these exhibits. Please refer to FCC KDB 726920 and the specific Document link for D01 found at: https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=41731 and review section II, 3) regarding specific information that must accompany these requests. 2 - Please refer to http://acbcert.com/documents/misc-docs/Memo-Short-Term-Vs-Standard-Confidentiality.pdf for complete details. 3 - Must be signed by applicant contact given for applicant on the FCC site, or by the authorized agent if an appropriate authorized agent letter has been provided. Letters should be placed on appropriate letterhead.

Page 1 of 40 EXTERNAL PHOTOS EUT Photo EUT Photo Page 2 of 40 Host Photo(HJH82C) Host Photo Page 3 of 40 Host Photo Host Photo Page 4 of 40 Host Photo Host Photo Page 5 of 40 Host Photo(HJH82D) Host Photo Page 6 of 40 Host Photo Host Photo Page 7 of 40 Host Photo Host Photo Page 8 of 40 Host Photo(HJSR05) Host Photo Page 9 of 40 Host Photo Host Photo Page 10 of 40 Host Photo Host Photo Page 11 of 40 Host Photo(HJSR06) Host Photo Page 12 of 40 Host Photo Host Photo Page 13 of 40 Host Photo Host Photo Page 14 of 40 Host Photo(HJH115) Host Photo Page 15 of 40 Host Photo Host Photo Page 16 of 40 Host Photo Host Photo Page 17 of 40 Host Photo(HJH116) Host Photo Page 18 of 40 Host Photo Host Photo Page 19 of 40 Host Photo Host Photo Page 20 of 40 Host Photo(HJH106) Host Photo Page 21 of 40 Host Photo Host Photo Page 22 of 40 Host Photo Host Photo

Page 23 of 40 Host Photo(HJH109) Host Photo Page 24 of 40 Host Photo Host Photo Page 25 of 40 Host Photo Host Photo Page 26 of 40 Host Photo(HJH73) Host Photo Page 27 of 40 Host Photo Host Photo Page 28 of 40 Host Photo Host Photo Page 29 of 40 Host Photo(HJSR08) Host Photo Page 30 of 40 Host Photo Host Photo Page 31 of 40 Host Photo Host Photo Page 32 of 40 Host Photo(HJSR13) Host Photo Page 33 of 40 Host Photo Host Photo Page 34 of 40 Host Photo Host Photo Page 35 of 40 Host Photo(HJSR14) Host Photo Page 36 of 40 Host Photo Host Photo Page 37 of 40 Host Photo Host Photo Page 38 of 40 Host Photo(HJH95) Host Photo Page 39 of 40 Host Photo Host Photo Page 40 of 40 Host Photo Host Photo

FCC ID Label: Label location: Model: HJ RF FCC ID: 2AJJGHJRF

Page 1 of 48 INTERNAL PHOTOS EUT Photo EUT Photo Page 2 of 48 Host Photo(HJH82C) Host Photo Page 3 of 48 Host Photo Host Photo Module Page 4 of 48 Host Photo Host Photo Page 5 of 48 Host Photo Host Photo(HJH82D) Antenna Page 6 of 48 Host Photo Host Photo Page 7 of 48 Host Photo Host Photo Page 8 of 48 Host Photo Host Photo Page 9 of 48 Host Photo(HJSR05) Host Photo Page 10 of 48 Host Photo Host Photo Page 11 of 48 Host Photo Host Photo Page 12 of 48 Host Photo Host Photo(HJSR06) Page 13 of 48 Host Photo Host Photo Page 14 of 48 Host Photo Host Photo Page 15 of 48 Host Photo Host Photo Page 16 of 48 Host Photo(HJH115) Host Photo

Page 17 of 48 Host Photo Host Photo Page 18 of 48 Host Photo Host Photo Page 19 of 48 Host Photo Host Photo(HJH116) Page 20 of 48 Host Photo Host Photo Page 21 of 48 Host Photo Host Photo Page 22 of 48 Host Photo Host Photo Page 23 of 48 Host Photo(HJH106) Host Photo Page 24 of 48 Host Photo Host Photo Page 25 of 48 Host Photo Host Photo Page 26 of 48 Host Photo Host Photo(HJH109) Page 27 of 48 Host Photo Host Photo Page 28 of 48 Host Photo Host Photo Page 29 of 48 Host Photo Host Photo Page 30 of 48 Host Photo(HJH73) Host Photo Page 31 of 48 Host Photo Host Photo Module

Page 32 of 48 Host Photo Host Photo Page 33 of 48 Host Photo Host Photo Antenna Page 34 of 48 Host Photo(HJSR08) Host Photo Page 35 of 48 Host Photo Host Photo Page 36 of 48 Host Photo Host Photo Page 37 of 48 Host Photo Host Photo(HJSR13) Page 38 of 48 Host Photo Host Photo Page 39 of 48 Host Photo Host Photo Page 40 of 48 Host Photo Host Photo(HJSR14) Page 41 of 48 Host Photo Host Photo Page 42 of 48 Host Photo Host Photo Page 43 of 48 Host Photo Host Photo Page 44 of 48 Host Photo(HJH95) Host Photo Page 45 of 48 Host Photo Host Photo Page 46 of 48 Host Photo Host Photo Page 47 of 48 Host Photo Host Photo Page 48 of 48 Host Photo Host Photo

Qingdao Richmat Intelligence Technology Inc RF TEST REPORT Report Type: FCC Part 15.249 & ISED RSS-210 RF report Model: HJ RF REPORT NUMBER: 210100807SHA-001 ISSUE DATE: February 1, 2021 DOCUMENT CONTROL NUMBER: TTRF15.249_V1 © 2018 Intertek Intertek Testing Services Shanghai Building No.86, 1198 Qinzhou Road (North) Caohejing Development Zone Shanghai 200233, China Telephone: 86 21 6127 8200 www.intertek.com TEST REPORT This report is for the exclusive use of Intertek's Client and is provided pursuant to the agreement between Intertek and its Client. Intertek's responsibility and liability are limited to the terms and conditions of the agreement. Intertek assumes no liability to any party, other than to the Client in accordance with the agreement, for any loss, expense or damage occasioned by the use of this report. Only the Client is authorized to permit copying or distribution of this report and then only in its entirety. Any use of the Intertek name or one of its marks for the sale or advertisement of the tested material, product or service must first be approved in writing by Intertek. The observations and test results in this report are relevant only to the sample tested. This report by itself does not imply that the material, product, or service is or has ever been under an Intertek certification program. TTRF15.249_V1 © 2018 Intertek Page 2 of 73 Report no.: 210100807SHA-001 Applicant: Qingdao Richmat Intelligence Technology Inc NO. 78 Kongquehe 4th Road Qingdao Clothing Industry park Jimo, Qingdao, Shandong 266000, China Manufacturer: Qingdao Richmat Intelligence Technology Inc NO. 78 Kongquehe 4th Road Qingdao Clothing Industry park Jimo, Qingdao, Shandong 266000, China FCC ID: 2AJJGHJRF SUMMARY: The equipment complies with the requirements according to the following standard(s) or Specification: 47CFR Part 15 (2019): Radio Frequency Devices (Subpart C) ANSI C63.10 (2013): American National Standard of Procedures for Compliance Testing of Unlicensed Wireless Devices RSS-210 Issue 9 (August 2016): Licence-exempt Radio Apparatus (All Frequency Bands): Category I Equipment RSS-Gen Issue 5 (March 2019) Amendment 1: General Requirements for Compliance of Radio Apparatus PREPARED BY: REVIEWED BY: Project Engineer Wade Zhang Reviewer Daniel Zhao Report No.: 210100807SHA-001 TEST REPORT TTRF15.249_V1 © 2018 Intertek Page 3 of 73 Content REVISION HISTORY................................................................................................................................................ 4 MEASUREMENT RESULT SUMMARY ..................................................................................................................... 5 1 GENERAL INFORMATION ............................................................................................................................. 6 1.1 DESCRIPTION OF EQUIPMENT UNDER TEST (EUT) ..................................................................................................... 6 1.2 TECHNICAL SPECIFICATION .................................................................................................................................... 6 1.3 DESCRIPTION OF TEST FACILITY .............................................................................................................................. 7 2 TEST SPECIFICATIONS ................................................................................................................................... 8 2.1 STANDARDS OR SPECIFICATION ............................................................................................................................... 8 2.2 MODE OF OPERATION DURING THE TEST ................................................................................................................... 8 2.3 TEST SOFTWARE LIST ............................................................................................................................................ 8 2.4 TEST PERIPHERALS LIST ......................................................................................................................................... 8 2.5 TEST ENVIRONMENT CONDITION: ............................................................................................................................ 8 2.6 INSTRUMENT LIST ................................................................................................................................................ 9 2.7 MEASUREMENT UNCERTAINTY ............................................................................................................................. 10 3 RADIATED EMISSION ................................................................................................................................. 11 3.1 LIMIT .............................................................................................................................................................. 11 3.2 MEASUREMENT PROCEDURE ............................................................................................................................... 11 3.3 TEST CONFIGURATION ........................................................................................................................................ 13 3.4 TEST RESULTS OF RADIATED EMISSIONS ................................................................................................................. 15 4 POWER LINE CONDUCTED EMISSION ......................................................................................................... 67 4.1 LIMIT .............................................................................................................................................................. 67 4.2 TEST CONFIGURATION ........................................................................................................................................ 67 4.3 MEASUREMENT PROCEDURE .............................................................................................…

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FCC ID: 2AJJGHJRF Test Setup FCC ID: 2AJJGHJRF 1. Radiated Emission 30-1000MHz Above 1GHz