2BUEQ-GOYO10GOYO-1.0

GOYO-1.0 User Manual Number/Name Description Main unit - USB Type-C charging port - 200 mAh Li-ion battery Number/Name Description Charging Port - USB Type-C charging port On/Off Switch - Power switch of the device Pairing Button - Button for initiating Bluetooth pairing LED Display - Indicates the status of the device 1 2 1 3 4 1 5 1 1 1. Batteries Cautions!) Use a USB Type-C charging cable rated for 5 V output and equipped with an overcurrent protection circuit to charge. The device battery is a 3.7 V lithium-polymer cell with a capacity of 200 mAh. Connect a charger with the correct output voltage to the device’s USB Type-C port. While the battery is charging, the LED display lights red, and the light turns off when charging is complete. 2. Registering Bluetooth pairing with the host device (first-time setup) 1. Turn the power switch ON. 2. Press and hold the pairing button for 3 seconds. 3. When the LED display flashes red and blue alternately, start pairing from the device you want to connect. 4. After the connection is established, confirm that the LED display blinks blue rapidly. 3. Bluetooth connection (reconnecting to a previously paired device) 1. Turn on Bluetooth on the previously paired device. 2. Turn the GOYO device’s power switch ON. 3. Press the pairing button briefly (about 1~2 seconds). The LED display will blink rapidly a few times, and the device will automatically reconnect over Bluetooth. How to Wear 1. After pairing, place the ear hook over your ear. 2. After attaching the microphone unit, 3. Put on the earphone. Proper microphone placement: Secure the microphone unit on the area between the underside of your jaw and your Adam’s apple. FCC Compliance 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. FCC Interference Statement 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 correct the interference by one 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 which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. FCC Caution Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

Intus Co., Ltd B147, 524, Bongeunsa-ro, Gangnam-gu, Seoul, South Korea Tel: +82-10-5505-0520 Rev 1/26/2023 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: February 05, 2025 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID : 2BUEQ-GOYO10 [INTUS CO., LTD] (“the applicant”) certifies that the equipment for which authorization is soughtis not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. [INTUS CO., LTD] (“the applicant”) certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant toDA-24-886andKDB 986446 D01 Covered Equipment Guidancesection B(2a). Device is inherently compliant based on hardware limitations or software controls. or A Software Bill of Materials (SBOM) is provided to the TCB for review, and The end-user or third parties cannot install additional software on this device. Sincerely, CEO / Yoonyoung Chung Intus Co., Ltd Intus Co., Ltd B147, 524, Bongeunsa-ro, Gangnam-gu, Seoul, South Korea Tel: +82-10-5505-0520 Rev 1/26/2023 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: February 05, 2025 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID : 2BUEQ-GOYO10 [INTUS CO., LTD] (“the applicant”) certifies that, as of the date of the filing of the application, the applicantis notidentified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Sincerely, CEO / Yoonyoung Chung Intus Co., Ltd

Intus Co., Ltd 87 Cheongam-ro Room 620, Pohang, Gyeongbuk, 37673, South Korea Tel: +82-10-4602-5792 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: February 05, 2025 Ref: Attestation Statements Part 2.911(d)(7) Filing FCC ID : 2BUEQ-GOYO10 Applicant FRN : 0037806411 Intus Co., Ltd certifies that, as of the date of the filing of the application, FCC US AGENT, LLC. is our designated U.S. agent for service of process for the above referenced FCC ID. Intus 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. FCC US AGENT, LLC. accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent Information: Company Name: FCC US Agent, LLC FRN: 0033402884 Address: 3722 Illinois Avenue, Saint Charles, IL, 60174, USA Contact Person: Tim Payne Phone: 708-571-3148 Email: [email protected] Sincerely, Intus Co., Ltd FCC US AGENT, LLC. CEO / Yoonyoung Chung Tim Payne [U.S. Agent signature] Rev 1/26/2023

Intus Co., Ltd 87 Cheongam-ro Room 620, Pohang, Gyeongbuk, 37673, South Korea Tel: +82-10-4602-5792 Date: February 12, 2025 Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 Regarding Application FCC ID : 2BUEQ-GOYO10, Reuse of test reports of FCC ID : 2ADHKBM83SM1 for new Certification We, Intus Co., Ltd, here by declare our product Model name: GOYO-1.0 (FCC ID : 2BUEQ- GOYO10 ) will reuse test reports of product Module (FCC ID : 2ADHKBM83SM1) as difference declaration as follow; 1. The certified transmitter module (FCC ID: 2ADHKBM83SM1) is implemented fully in accordance with the module grantee’s approved integration instructions. 2. No hardware changes have been made to the transmitter module, including but not li mited to the RF circuitry, shielding, power supply, clocking, or antenna interface. 3. No software or firmware changes have been made to the transmitter module that wo uld affect RF parameters such as output power, modulation, bandwidth, or frequenc y operation. 4. Our product integrated BLE Module (FCC ID : 2ADHKBM83SM1), And the version is identical to that specified in the module test report. So conducted test data re-used (FCC Report No. 50209104 001 / Power setting for Class 2); 5. Radiation emission is tested and reported in Report (Report Number: KES-RF250806); Sincerely Yours, CEO / Yoonyoung Chung Intus Co., Ltd

Intus Co., Ltd 87 Cheongam-ro Room 620, Pohang, Gyeongbuk, 37673, South Korea Tel: +82-10-4602-5792 Date: February 05, 2025 Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 Confidentiality Request regarding application for certification of FCC ID : 2BUEQ-GOYO10 Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules and IC regulation, we hereby request confidential treatment of information accompanying this application as outlined below: PERMANENT Exhibit TypeFile Name Part ListPart List.pdf Schematics Diagram(s)Schematic.pdf Operation descriptionOperation description.pdf Block diagramBlock diagram.pdf And the above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Sincerely, CEO / Yoonyoung Chung Intus Co., Ltd

Intus Co., Ltd 87 Cheongam-ro Room 620, Pohang, Gyeongbuk, 37673, South Korea Tel: +82-10-4602-5792 Date: February 05, 2025 Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 FCC ID : 2BUEQ-GOYO10 To whom it may concern: I, the undersigned, hereby authorize Young-Jin, Lee of KES Co., Ltd. and hereafter referred to as KES Co., Ltd., to act on our behalf in all manners relating to application for equipment authorization, including signing of all documents relating to these matters. Any and all acts carried out by Young-Jin, Lee of KES Co., Ltd. on our behalf shall have the same effect as acts of our own. I, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). In authorizing KES Co., Ltd. as our agent, we still recognize that we are responsible to: a)comply with the relevant provisions of the certification program; b)make all necessary arrangements for the conduct of the evaluation, including provision for examining documentation and access to all areas, records (including internal audit reports) and personnel for the purposes of evaluation (e.g. testing, inspection, assessment, surveillance, reassessment) and resolution of complaints; c)make claims regarding certification only in respect of the scope for which certification has been granted; d)do not use our product certification in such a manner as to bring the Certification Division into disrepute and not make any statement regarding our product certification which the Certification Division may consider misleading or unauthorized; e)upon suspension or cancellation of certification, discontinue use of all advertising matter that contains any reference thereto and return any certification documents as required by the Certification Division; f)use certification only to indicate the products are certified as being in conformity with specified standards; Intus Co., Ltd 87 Cheongam-ro Room 620, Pohang, Gyeongbuk, 37673, South Korea Tel: +82-10-4602-5792 g)endeavor to ensure that no certificate or report nor any part thereof is used in a misleading manner; h)ensure that any reference to our product certification in communication media such as documents, brochures or advertising, complies with the requirements of the Certification Division; i)keep a record of all complaints made known to the us relating to the product’s compliance with requirements of the relevant standard and to make these records available to the Certification Division when requested; j)take appropriate action with respect to such complaints and any deficiencies found in products or services that affect compliance with the requirements for certification; k)document the actions taken. This authorization is valid until further written notice from the applicant. Sincerely Yours, CEO / Yoonyoung Chung Intus Co., Ltd REMARK: 1.This authorization letter will be sent along with your application when filing with the Certification Division. 2.Please follow the format and type it on company letterhead and send original to us. 3.Authorized signature must be in agreement with grantee code contact in FCC database.

FCC ID : 2BUEQ-GOYO10Page 1 of 2 External photos FCC ID : 2BUEQ-GOYO10Page 2 of 2

FCC ID : 2BUEQ-GOYO10 Page 1 of 1 Label & Label Location The device is so small that it is not practicable to place the statement specified under 15.19 statement request, the information required by this paragraph shall be placed in a prominent location in the User’s Manual.

FCC ID : 2BUEQ-GOYO10Page 1 of 2 Internal photos FCC ID : 2BUEQ-GOYO10Page 2 of 2 PCB Antenna

FCC ID : 2BUEQ-GOYO10Page 1 of 1 RF exposure FCC ID : 2BUEQ-GOYO10 According to 447498 D01 General RF Exposure Guidance v06 The 1-g and 10-g SAR test exclusion thresholds for 100㎒to 6㎓ at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ·[√f(㎓)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, Where; f(㎓) is the RF channel transmit frequency in㎓ Power and distance are rounded to the nearest㎽andmmbefore calculation The result is rounded to one decimal place for comparison Results Mode Frequency (㎓) Distance (mm) Maxtune-up power (㏈m) Calculation value Exclusion Threshold (㏈m)(㎽) LE 1 Mbps2.402 ~ 2.48052.01.5850.499≤3.0

TEST REPORT Report No. : KES-RF250806 Page1/23 KES Co., Ltd. #3002, #3503, #3701, 40, Simin-daero365beon-gil, Dongan-gu, Anyang-si,Gyeonggi-do, 14057, Republic ofKorea Tel : +82-31-425-6200, Fax : +82-31-341-3838 KES-QP16-F01(00-23-01-01)KES Co., Ltd. You can check the authenticity of this test report on the authenticity verification page on our website (www.kes.co.kr). FCC TEST REPORT 1. Client ○ Name : Intus Co., Ltd ○ Address : 87 Cheongam-ro Room 620, Pohang, Gyeongbuk, 37673, South Korea 2. Sample Description ○ Product item : GOYO-1.0 ○ Model name : GOYO-1.0 ○ Manufacturer etc. : Intus Co., Ltd 3. Date of test :2025.12.15 ~ 2026.02.04 4. Location of Test :Permanent Testing LabOn Site Testing ○ Address : 473-21, Gayeo-ro, Yeoju-si, Gyeonggi-do, 12658, Rep. of Korea 5. FCC Rule part(s) :Part 15 Subpart C 15.247 6. Test result :PASS The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This test report cannot be reproduced and copied without permission without the written consent of KES Co., Ltd. This laboratory is not accredited for the test results marked *. This test report is not related to KOLAS accreditation. Affirmation Tested byTechnical Manager Name : Gu-Bong, Kang(Signature) Name :Yeong-Jun Cho(Signature) 2026. 02. 10 KES Co., Ltd. Report No. : KES-RF250806 Page2/23 KES-QP16-F01(00-23-01-01)KES Co., Ltd. You can check the authenticity of this test report on the authenticity verification page on our website (www.kes.co.kr). REPORT REVISION HISTORY DateTest Report No.Revision History 2026.02.10KES-RF250806Initial This report shall not be reproduced except in full, without the written approval of KES Co., Ltd. This document may be altered or revised by KES Co., Ltd. personnel only, and shall be noted in the revision section of the document. Any alteration of this document not carried out by KES Co., Ltd. will constitute fraud and shall nullify the document. Report No. : KES-RF250806 Page3/23 KES-QP16-F01(00-23-01-01)KES Co., Ltd. You can check the authenticity of this test report on the authenticity verification page on our website (www.kes.co.kr). TABLE OF CONTENTS 1.General information.................................................................................................... 4 1.1.EUT description............................................................................................. 4 1.2.Test configuration........................................................................................... 4 1.3.Information about derivative model...................................................................... 5 1.4.Accessory information...................................................................................... 5 1.5.Device modifications........................................................................................ 5 1.6.Sample calculation.......................................................................................... 5 1.7.Measurement Uncertainty................................................................................. 5 1.8.Frequency/channel operations............................................................................ 5 2.Summary of tests....................................................................................................... 6 3.Test results............................................................................................................... 7 3.1.Radiated restricted band and emissions................................................................ 7 3.2.AC conducted emissions................................................................................. 20 3.3.Antenna Requirement.................................................................................... 22 Appendix A.Measurement equipment................................................................................ 23 Report No. : KES-RF250806 Page4/23 KES-QP16-F01(00-23-01-01)KES Co., Ltd. You can check the authenticity of this test report on the authenticity verification page on our website (www.kes.co.kr). 1.General information Applicant:Intus Co., Ltd Applicant address:87 Cheongam-ro Room 620, Pohang, Gyeongbuk, 37673, South Korea Test site:KES Co., Ltd. Test site address:#3002, #3503, #3701, 40, Simin-daero365beon-gil, Dongan-gu, Anyang-si, Gyeonggi-do, 14057, Rep. of Korea 473-21, Gayeo-ro, Yeoju-si, Gyeonggi-do, 12658, Rep. of Korea Test FacilityFCC Accreditation Designation No.: KR0100, Registration No.: 444148 FCC rule part(s):15.247 FCC ID:2BUEQ-GOYO10 Module’s FCC ID:2ADHKBM83SM1 Test device serial No.:ProductionPre-productionEngineering 1.1.EUT description Equipment under testGOYO-1.0 Frequency range & Number of channels 2 402㎒~ 2 480㎒(LE 1) : 40 ch ModelGOYO-1.0 Modulation techniqueGFSK Antenna specification PCB Antenna // Peak gain: 3.5㏈i Power sourceDC 3.7 V (Battery) H/W versionV1.0 F/W versionV1.1 1.2.Test configuration TheIntus Co., Ltd // GOYO-1.0 // GOYO-1.0 // FCC ID: 2BUEQ-GOYO10was tested according to the specification of EUT, the EUT must comply with following standards and KDB documents. FCC Part 15.247 KDB 558074 D01 v05 r02 ANSI C63.10-2020 Report No. : KES-RF250806 Page5/23 KES-QP16-F01(00-23-01-01)KES Co., Ltd. You can check the authenticity of this test report on the authenticity verification page on our website (www.kes.co.kr). 1.3.Information about derivative model N/A. 1.4.Accessory information EquipmentManufacturerModelSerial No.Power source Cable---- 1.5.Device modifications N/A 1.6.Sample calculation Where relevant, the following sample calculation is provided For all conducted test items : The offset level is set in the spectrum analyzer to compensate the RF cable loss and attenuator factor between EUT conducted output port and spectrum analyzer. With the offset compensation, the spectrum analyzer reading level is exactly the EUT RF output level. For Radiation test : Field strength level (㏈㎶/m) = Measured level (㏈㎶) + Antenna factor (㏈) + Cable loss…

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BM83 PCB Antenna Information Data Sheet © 2019-2024 Microchip Technology Inc. and its subsidiaries DS70005402G - 51 7. PCB Antenna Information The BM83 module is integrated with a PCB antenna. This chapter provides the radiation pattern, its orientation, and characteristics. 7.1 Antenna Radiation Pattern The following figure illustrates the 3D radiation pattern of the PCB antenna at 2438 MHz. Figure 7-1. PCB Antenna 3D Radiation Pattern At 2438 MHz (1) 1. The preceding figure illustrates the typical radiation pattern with BM83 module on the 45 mm x 45 mm BM83 Carrier Board. BM83 PCB Antenna Information Data Sheet © 2019-2024 Microchip Technology Inc. and its subsidiaries DS70005402G - 52 The following figure illustrates the module orientation for antenna radiation pattern. Figure 7-2. Module Orientation for Radiation Pattern BM83 PCB Antenna Information Data Sheet © 2019-2024 Microchip Technology Inc. and its subsidiaries DS70005402G - 53 Figure 7-3. Polar Plots (1) 1. The preceding figure illustrates the typical radiation pattern with BM83 module on the 45 mm x 45 mm BM83 Carrier Board. The following table provides the characteristics of PCB antenna with BM83 Module mounted on BM83 Carrier Board, plugged into BM83 EVB. Table 7-1. BM83 PCB Antenna Characteristics ParameterValue Frequency2400 MHz to 2480 MHz Peak Gain3.5 dBi Efficiency80% 7.2 Module Placement Guidelines For a Bluetooth-enabled product, the antenna placement affects the overall performance of the system. The antenna requires free space to radiate RF signals and it must not be surrounded by the BM83 PCB Antenna Information Data Sheet © 2019-2024 Microchip Technology Inc. and its subsidiaries DS70005402G - 54 ground plane. It is recommended that the areas underneath the antenna on the host PCB must not contain copper on the top, inner, or bottom layers, as illustrated in the following figure. Figure 7-4. Recommended Keep-out Area for PCB Antenna A low-impedance ground plane ensures the best radio performance (best range, lowest noise). The ground plane can be extended beyond the minimum recommendation as required for the main Printed Circuit Board (PCB) Electromagnetic Compatibility (EMC) noise reduction. For the best range performance, keep all external metal at least 15 mm away from the on-board PCB trace antenna. The following figure illustrates the example of recommended placement of the BM83 module on a host board for the best RF performance. Figure 7-5. Recommended Module Placement The application board provides a continuous ground plane equal to or greater than the module dimension below the module PCB. Trace routing is not recommended on the application board top layer underneath the module. Bigger ground plane is recommended for better antenna range performance. The reference radiation pattern data provided above uses a BM83 Carrier Board with a dimension of 45 mm x 45 mm. The following figure illustrates the ground plane placement of BM83 module on the host board. The BM83 FCC/ISED certification requires the host board to provide a continuous ground plane with minimum size equal to the BM83 module dimension directly beneath the module (16mmx19mm ). Provide ground plane with distributed via stitching. BM83 PCB Antenna Information Data Sheet © 2019-2024 Microchip Technology Inc. and its subsidiaries DS70005402G - 55 Avoid trace routing directly under the module. A small cut out can be provided on the host PCB below the module RF test point in order to solder pig tail SMA cable and perform conducted RF measurements. Figure 7-6. Ground Plane on Host Application Board Bottom View No copper, No component, and Keep-out area Top View 18 17 16 15 14 13 12 11 10 19 9 8 7 6 5 4 3 2 1 20 33 34 35 36 37 38 39 40 41 32 42 43 44 45 46 47 48 49 50 31 3026292725 23 22 28 2421 BM83 GND Module Antenna area GND RF Test Pad No PCB area

FCC ID : 2BUEQ-GOYO10Page 1 of 1 Test setup photos Radiated testAC Conducted test Blank