FCC ID: W5J-D420 Professional Digital Two-Way Radio

FCC STATEMENTS WARNING AND COMPLIANCE FCC Part 15.121(f) Warning Statement STATEMENT:

FCC Part 15.19 Warning 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 including received interference that may cause undesired operation. FCC Part 15.21 Warning Statement is not responsible for any changes or The grantee modifications not expressly approved by the party responsible for compliance. Such modifications could void the users authority to operate the equipment. Replacement of any

(crystal, semiconductor, etc) not authorized by the FCC equipment authorization for this radio could violate FCC rules. transmitter component WARNING: MODIFICATION OF THIS DEVICE TO RECEIVE CELLULAR RADIOTELEPHONE SERVICE SIGNALS PROHIBITED UNDER FCC RULES AND FEDERAL LAW. IS FCC Part 15.105(b) Warning Statement 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. 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:

If with the FCC RF exposure limits of this radio. 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. RF Exposure Statement Our radio generators RF electromagnetic energy during transmit mode. This radio is designed for and classified as Occupational Use Only meaning it must be used only during the course of employment by individuals aware of the hazards and the ways to Minimize Such hazards. This radio is NOT intended for use by the General Population in an uncontrolled environment. This radio has been tested and complies with the FCC RF exposure limits for Occupational Use Only. Inaddition, our radio complies with the following Standards and Guidelines with to RF energy and regard electromagnetic energy levels and evaluation of such levels for exposure to humans:

---IEEE Std. 1528:2013 and KDB447498, Evaluating Compliance with FCC Guidelines for Human Exposure to Radio Frequency Electromagnetic Fields.

---American National Standards Institute (C95.1-1992), IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields 3 kHz to 300 GHz.

---American National Standards Institute (C95.3-1992), IEEE Recommended Practice for the Measurement of Potentially Hazardous Electromagnetic Fields-RF and Microwave. The information listed above provides the user with the information needed to make him or her aware of RF exposure and what to do to as-sure that this radio operates Electromagnetic Interference/Compatibility During transmissions, The radio generates RF energy that can possibly cause interference with other devices or systems. To avoid such interference, turn off the radio in areas where signs are posted to do so. DO NOT operate the transmitter in areas that are sensitive to electromagnetic radiation such as hospitals, aircraft and blasting sites. Occupational/Controlled Use The radio transmitter is used in situations in which persons are exposed as consequence of their employment provided those persons are fully aware of the potential for exposure and can exercise control over their exposure. Attention This radio complieswith IEEE and ICNIRP exposure limits for occupational/controlled RF exposure emvironment at operating duty factors of up to 50% and is authorized by the FCC for Occupational Use Only. An appropriate warning lable is affixed to all units. In order to comply with RF exposure requirements, a minimum distance of 2.5 cm must be maintained when held-to-face, and body-worn operations are restricted to the approved original acessories

(belt clip), a minimum distance of 0 cm. Do not use this device when antenna shows obvious damages.

REE Engineering, Inc. 1905 Jasper St. Unit A , Aurora, Colorado 80011 United States Federal Communications Comm ission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 05-18-2023 Ref: Attestation Statements Part 2.9ll(d)(S}(i) Filing FCC ID: WSJ-D420

[REE Engineering, Inc.] ("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 F ~

les.

(Applicant signature)

( David Eames)

REE Engineering, Inc. 1905 Jasper St. Unit A, Aurora, Colorado 80011 United States Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 05-18-2023 Ref: Attestation Statements Part 2.911(d)(S)(ii) Filing FCC ID: WSJ-D420

[REE Engineering, Inc.) ("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)

(David Eames)

REE Engineering, Inc. 1905 Jasper St. Unit A , Aurora, Colorado 80011 United States Section 2.911(d)(7) USAAgent for Service of Process FCC ID: W5J-D420 2.911 (d)(7) USA Designated Agent for Service of Process We. [REE Engineering, Inc.] ("the applicant') designate [REE Engineering, Inc.) NOTE ror the purpose or 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 or 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 mar1\eting 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 & Applicant Company name: REE Engineering, Inc. Address: 1905 Jasper St. Unit A, Aurora, Colorado 80011 United States Contact Name: David Eames Telephone No: (850) 863-2688 iece.com Signature:

Date: May 18, 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:/Jwww. federalregister govtdocuments/2023/02/06/2022-28263/protecting-aga1nst-national-secunty-threats--to-the-comm unications-supply-chain-throuqh-the 2.911 (d)(7)USA Agent vl.2

REE Engineering, Inc. 1905 Jasper St. Unit A, Aurora, Colorado 80011 United States Agent Authorization Company: REE Engineering, Inc. Address: 1905 Jasper St. Unit A, Aurora, Colorado 80011 United States Product Name: Professional Digital Two-Way Radio Model Number(s): D420 HUE Product Description: Professional Digital Two-Way Radio 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: 2023-05-18 Name:

David Eames Company: REE Engineering, Inc.

REE Engineering, Inc. 1905 Jasper St. Unit A, Aurora, Colorado 80011 United States Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Subject; Request for Confidentiality FCC ID: W5J-D420 Date: 2023-05- 18 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.

[8] Schematic Diagram

[8] Block Diagram

[8] Parts List

[:gl Operational Description

[8] Tune-up Procedure 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);

D External Photos D Test Setup Photos D Internal Photos D User Manual D For 45 days, pursuant to Public Notice DA 04-1705. OR D For 180 days pursuant to KDB 726920 001 . 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 su d. Sincerely

--'--------- / / ~ I --

Contact person: David Eames

REE Engineering, Inc. 1905 Jasper St. Unit A, Aurora, Colorado 80011 United States Declaration Letter Date: 2023-05-25 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Declaration of compliance to the requirements of 15.121 with FCC ID: W5J-D420 Dear Sir/Madam, We declare that, this scanning receiver is incapable of operating (tuning), or readily being altered by the users to operate, within the frequency bands allocated to the Cellular Radiotelephone Service in part 22 of this chapter (cellular telephone bands). This device will not be able to receive transmissions in the cellular telephone bands by means of clipping the leads of, or installing, a simple component such as a diode, resistor or jumper wire;

replacing a plug-in semiconductor chip; or programming a semiconductor chip using special access codes or an external device, such as a personal computer. This device is also incapable of converting digital cellular communication transmissions to analog voice audio. This device is designed so that the tuning, control and filtering circuitry is inaccessible. Any attempts to modify the equipment to receive transmissions from the Cellular Radiotelephone Service will render the receiver inoperable. This scanning receiver rejects any signals from the Cellular Radiotelephone Service frequency bands that are 38 dB or lower based upon a 12 dB SINAD measurement. We are aware that the modification of this device to receive transmissions from Cellular Radiotelephone Service frequency bands will be considered to constitute manufacture of such equipment. This includes any individual, individuals, entity or organization that modifies one or more scanners. Any modification to receive transmissions from the Cellular Radiotelephone Service frequency bands voids the certification of the scanning receiver, regardless of the date of manufacture of the original unit. Sincerely Yours, Signature:

___________________________ David Eames, Chairman

REE Engineering, Inc. 1905 Jasper St. Unit A, Aurora, Colorado 80011 United States FCC Part 90 Letter Date: 2023-05-25 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Declaration of compliance to the requirements of 90.203 With FCC ID: W5J-D420 Dear Sir/Madam, We, REE Engineering, Inc., acknowledge that this device will not be marketed to USA users with the frequency band which is not allowed by rule part 90.203 and it is a violation of FCC rules if this device is operated on unauthorized frequencies inside the U.S.A. This equipment meets the requirements of the FCC Rules, Parts 90.203(e) and (g), as applicable. Programming of this products transmit frequencies can be performed ONLY by the manufacturer or by service or by maintenance personal. The operator cant program transmit frequencies using the equipments external operation controls. This is to certify that the requirements of 47 CFR Part 90.203(j)(4) and (5) spectrum efficiency are met by the REE Engineering, Inc. demonstrated by the tests conducted on the sample radio provided. The tests show that the 4FSK data rate is in accordance with ETSI TS 102 361-1, that is 9600 bits per second in a 12.5 kHz bandwidth to satisfy the data rate requirement of 4800 bits per second per 6.25 kHz of channel bandwidth (7K60F1D emissions). Additionally the radio uses the AMBE+2 half-rate vocoder to compress 60 ms of normal bursts are sent in alternate 30 ms TDMA slots and so comply with the equivalence of one voice channel per 6.25 kHz bandwidth (7K60F1W emission). Additionally the radio also meets the requirement of one voice channel per 12.5 kHz of channel bandwidth for analogue speech (11k0F3E emission). Sincerely Yours, Signature:

___________________________ David Eames, Chairman