2AZWB-MERCHBOX13MMerch Box13_MOUSE

KEYTH INTERNATIONAL B2-#2, Horim Art Center Building 1., 317, Dosan-daero, Gangnam-gu, Seoul, South Korea Subject : Covered List Attestation Letter (Section 2.911 (d)(5)(i)(ii)) Date: 9/11/2023 FCC ID: 2AZWB-MERCHBOX13K, 2AZWB-MERCHBOX13M To: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA KEYTH INTERNATIONAL 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 FCC rules. 2.911 (d)(5)(i)(ii) And, we certifies that one of following, ☒ 1. We are not identified on the Covered List and are not an affiliate or subsidiary of an entity identified on the Covered List. ☐ 2. We are identified on the Covered List as an entity producing “covered” equipment. But, we can be authorized since the reason as explained below. ☐ 3. We are an affiliate or subsidiary of an entity identified on the Covered List. But, we can be authorized since the reason as explained below. *Only one of paragraphs 1, 2 or 3 should be checked, if checked on paragraphs 2 or 3, the reason why it does not include the “covered” equipment should be addressed. Sincerely yours, (Name) Soo Jeong Choi (Title) Manager (Company Name) KEYTH INTERNATIONAL

KEYTH INTERNATIONAL B2-#2, Horim Art Center Building 1., 317, Dosan-daero, Gangnam-gu, Seoul, South Korea V02072023 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 09/12/23 Ref: Attestation Statement Part 2.911(d)(7) Filing FCC ID:2AZWB-MERCHBOX13K, 2AZWB-MERCHBOX13M KEYTH INTERNATIONAL certifies that, as of the dates of this application, Americas Compliance Consulting LLC dba iCertifi “iCertifi” is our designated U.S. agent for service of process for the above referenced FCC ID. KEYTH INTERNATIONAL 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. iCertifi accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service process for the above referenced FCC ID. Designated U.S. Agent Information: Name: Americas Compliance consulting, LLC dba iCertifi FCC FRN: 0033399411 Address: 1001 SW Disk Drive, Suite 250, Bend, Oregon 97702 Contact Person: Paul Preston Tel: 866-885-4575 Email: [email protected] Sincerely, KEYTH INTERNATIONAL FRN: 0030921944 Americas Compliance Consulting LLC dba iCertifi Contact name: Soo Jeong Choi Paul Preston Signature

KEYTH INTERNATIONAL B2-#2, Horim Art Center Building 1., 317, Dosan-daero, Gangnam-gu, Seoul, South Korea Date: To: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD To whom it may concern: Subject : FCC Agent Authorization Letter for FCC ID :2AZWB-MERCHBOX13M This authorization is valid until further written notice from the applicant. Sincerely, Signed by: (Name) Soo Jeong Choi (Title) Manager [email protected] 82-2-3448-0777 (Address) September 6, 2023 B2-#2, Horim Art Center Building 1., 317, Dosan-daero, Gangnam-gu, Seoul, South Korea We, the undersigned, hereby authorize HCT 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 HCT CO., LTD. on our behalf shall have the same effect as acts of our own. We, 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). We recognize that we are still responsible for the terms and conditions outlined in the HCT America Client Services Agreement. ___________________________________ (Email Address) (Phone number)

KEYTH INTERNATIONAL B2-#2, Horim Art Center Building 1., 317, Dosan-daero, Gangnam-gu, Seoul, South Korea Date: To: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD SUBJECT: Request for Confidentiality for FCC ID:2AZWB-MERCHBOX13M We hereby request confidential treatment of the information accompanying this application as outlined below: Exhibit 1 2 3 4 5 6 7 8 Sincerely, Signed by: (Name) Soo Jeong Choi (Title) Manager (Email Address) [email protected] (Phone number) 82-2-3448-0777 (Address) B2-#2, Horim Art Center Building 1., 317, Dosan-daero, Gangnam- gu, Seoul, South Korea September 6, 2023 Description Block Diagram Operational Description 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 & 0.459 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. LONG-TERM CONFIDENTIAL SHORT-TERM CONFIDENTIAL (180 DAYS) User’s Manual Test-Setup Photos Internal Photos External Photos Schematics Parts List LONG-TERM AND SHORT-TERM CONFIDENTIAL LIST

FCC ID: 2AZWB-MERCHBOX13M HCT CO., LTD. 74, Seoicheon-ro 578beon-gil, Majang-myeon, Icheon-si, Gyeonggi-do, 17383, Rep. of KOREA TEL : + 82 31 645 6300 FAX : + 82 31 645 6401 www.hct.co.kr Page １ of 4 EXTERNAL PHOTOGRAPHS FCC ID: 2AZWB-MERCHBOX13M HCT CO., LTD. 74, Seoicheon-ro 578beon-gil, Majang-myeon, Icheon-si, Gyeonggi-do, 17383, Rep. of KOREA TEL : + 82 31 645 6300 FAX : + 82 31 645 6401 www.hct.co.kr Page ２ of 4 ■ EXTERNAL PHOTO FCC ID: 2AZWB-MERCHBOX13M HCT CO., LTD. 74, Seoicheon-ro 578beon-gil, Majang-myeon, Icheon-si, Gyeonggi-do, 17383, Rep. of KOREA TEL : + 82 31 645 6300 FAX : + 82 31 645 6401 www.hct.co.kr Page ３ of 4 FCC ID: 2AZWB-MERCHBOX13M HCT CO., LTD. 74, Seoicheon-ro 578beon-gil, Majang-myeon, Icheon-si, Gyeonggi-do, 17383, Rep. of KOREA TEL : + 82 31 645 6300 FAX : + 82 31 645 6401 www.hct.co.kr Page ４ of 4

<Label and Location> Back side

FCC ID: 2AZWB-MERCHBOX13M HCT CO., LTD. 74, Seoicheon-ro 578beon-gil, Majang-myeon, Icheon-si, Gyeonggi-do, 17383, Rep. of KOREA TEL : + 82 31 645 6300 FAX : + 82 31 645 6401 www.hct.co.kr Page １ of 3 INTERNAL PHOTOGRAPHS FCC ID: 2AZWB-MERCHBOX13M HCT CO., LTD. 74, Seoicheon-ro 578beon-gil, Majang-myeon, Icheon-si, Gyeonggi-do, 17383, Rep. of KOREA TEL : + 82 31 645 6300 FAX : + 82 31 645 6401 www.hct.co.kr Page ２ of 3 ■ INTERNAL PHOTO FCC ID: 2AZWB-MERCHBOX13M HCT CO., LTD. 74, Seoicheon-ro 578beon-gil, Majang-myeon, Icheon-si, Gyeonggi-do, 17383, Rep. of KOREA TEL : + 82 31 645 6300 FAX : + 82 31 645 6401 www.hct.co.kr Page ３ of 3 ■ INTERNAL PHOTO(Antenna)

On your side HCT Co., Ltd. 74, Seoicheon-ro 578beon-gil, Majang-myeon, Icheon-si, Gyeonggi-do, 17383 KOREA Tel. +82 31 645 6300 F ax. +82 31 645 6401 F-TP22-03 (Rev. 04) The report shall not be reproduced except in full(only partly) without approval of the laboratory. Page 1 of 6 . TEST REPORT FCC SAR Exclusion Report for MerchBox13M Certification APPLICANT KEYTH INTERNATIONAL REPORT NO. HCT-SR-2309-FC002-R3 DATE OF ISSUE September 27, 2023 Technical Manager Yun Jeang Heo (signature) Accredited by KOLAS, Republic of KOREA F-TP22-03 (Rev. 04) Page 2 of 6 HCT Co., Ltd. 74, Seoicheon-ro 578beon-gil, Majang-myeon, Icheon-si, Gyeonggi-do, 17383 KOREA Tel. +82 31 634 6300 Fax. +82 31 645 6401 TE S T R E P O R T REPORT NO. HCT-SR-2309-FC002-R3 DATE OF ISSUE September 27, 2023 Applicant KEYTH INTERNATIONAL 317, Dosan-daero, Gangnam-gu, Seoul, South Korea EUT Type Model Name Merch Box13_MOUSE MerchBox13M FCC ID 2AZWB-MERCHBOX13M Max. RF Output Power -7.5 dBm FCC Rule Part(s) 47CFR §2.1093 The result shown in this test report refer only to the sample(s) tested unless otherwise stated. This test results were applied only to the test methods required by the standard. Report No. HCT-SR-2309-FC002-R3 F-TP22-03 (Rev. 04) Page 3 of 6 REVISION HISTORY The revision history for this test report is shown in table. Revision No. Date of Issue Description 0 September 05, 2023 Initial Release 1 September 18, 2023 Revised Applicant’s Address 2 September 26, 2023 Revised Applicant’s Address 3 September 27, 2023 Revised Equipment Name Engineering Statement: The measurements shown in this report were made in accordance with the procedures indicated, and the emissions from this equipment were found to be within the limits applicable. I assume full responsibility for the accuracy and completeness of these measurements, and for the qualifications of all persons taking them. It is further stated that upon the basis of the measurements made, the equipment tested is capable of operation in accordance with the requirements of the FCC Rules under normal use and maintenance. This laboratory is not accredited for the test results marked *. The above Test Report is the accredited test result by (KS Q) ISO/IEC 17025 AND KOLAS (Korea Laboratory Accreditation Scheme), which signed the ILAC-MRA. (HCT Accreditation No.: KT197) If this report is required to confirmation of authenticity, please contact to www.hct.co.kr Report No. HCT-SR-2309-FC002-R3 F-TP22-03 (Rev. 04) Page 4 of 6 CONTENTS 1. EUT DESCRIPTION 5 2. TEST METHODOLOGY 6 2.1 FCC 6 Report No. HCT-SR-2309-FC002-R3 F-TP22-03 (Rev. 04) Page 5 of 6 1. EUT DESCRIPTION Model Name MerchBox13M EUT Type Merch Box13_MOUSE Power Supply 1.5 V Frequency Range 2.4 GHz ISM Band 2 402 ㎒ – 2 480 ㎒ Max. RF Output Power -7.5 dBm (EIRP) Modulation Type GFSK Modulation Technique FHSS Number of Channels 40 Channels Channel Spacing, Bandwidth 2 ㎒ Antenna Specification Antenna type: Printed Antenna Peak Gain: -4.62 dBi EUT Serial numbers Radiated: MerchBox13M-01 Conducted: MerchBox13M-02 Manufacturer KEYTH INTERNATIONAL 317, Dosan-daero, Gangnam-gu, Seoul, South Korea Report No. HCT-SR-2309-FC002-R3 F-TP22-03 (Rev. 04) Page 6 of 6 2. TEST METHODOLOGY 2.1 FCC Limb SAR and Body SAR Test Exclusions Applied _ GFSK Since this product is a remote Mouse product, it is used by most users in the hand, so Limb SAR standard is applied. In addition, since this product is capable of Portable device by the user, an exception evaluation is applied at a distance of 10 ㎜ from the Body SAR. According to the FCC KDB 447498 D01 v06 section 4.3.1, for 100 ㎒ to 6 ㎓ and test separation distances ≤ 50 ㎜, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: a) For 100 ㎒ to 6 ㎓ and test separation distances ≤ 50 ㎜, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(max. power of channel, including tune-up tolerance, ㎽) / (min. test separation distance, ㎜)] · [√f(㎓)] ≤ 3.0 for 1-g SAR, and ≤ 7.5 for 10-g extremity SAR, where : 푀푎푥 푃표푤푒푟 표푓 퐶ℎ푎푛푛푒푙 ( 푚푊 ) 푇푒푠푡 푆푒푝푎푟푎푡푖표푛 퐷푖푠푡푎푛푐푒 ( 푚푚 ) ∗ √ 퐹푟푒푞푢푒푛푐푦 ( 퐺퐻푧 ) ≤ 3.0 For 1g SAR,7.5.for 10g SAR where - f(㎓) is the RF channel transmit frequency in ㎓ - Power and distance are rounded to the nearest ㎽ and ㎜ before calculation - The result is rounded to one decimal place for comparison Calculation Result: Tx frequency range: 2 402 ㎒ ~ 2 480 ㎒ Limb SAR Consideration Min. test separation distance: 5 ㎜ Body SAR Consideration Min. test separation distance: 10 ㎜ Maximum Output Power: -7.5 dBm(0.18 ㎽) The Highest RF channel frequency: 2 480 ㎒ For Body SAR Exclusion Mode Frequency Maximum Allowed Power Separation Distance ≤ 3.0 for 1 g SAR [㎒] [㎽] [㎜] GFSK 2 480 0.18 10 0.03 For Limb SAR exclusion Mode Frequency Maximum Allowed Power Separation Distance ≤ 7.5 for 10 g SAR [㎒] [㎽] [㎜] GFSK 2 480 0.18 5 0.06 Based on the maximum output power of MerchBox13M and antenna to use separation distance, MerchBox13M Limb SAR and Body SAR were not required.

TEST REPORT FCC Test for MerchBox13M Certification APPLICANT KEYTH INTERNATIONAL REPORT NO. HCT-RF-2309-FC002-R3 DATE OF ISSUE September 27, 2023 Tested by Kyung Jun Woo Technical Manager Jong Seok Lee Accredited by KOLAS, Republic of KOREA F-TP22-03(Rev.04) HCT CO., LTD. 74, Seoicheon-ro 578beon-gil, Majang-myeon, Icheon-si, Gyeonggi-do, 17383 KOREA Tel. +82 31 634 6300 Fax. +82 31 645 6401 1 / 43 The report shall not be reproduced except in full(only partly) without approval of the laboratory. F-TP22-03 (Rev. 04) Page 2 of 43 HCT Co., Ltd. 74, Seoicheon-ro 578beon-gil, Majang-myeon, Icheon-si, Gyeonggi-do, 17383 KOREA Tel. +82 31 634 6300 Fax. +82 31 645 6401 TEST REPORT FCC 2.4 GHz ISM Band Test for MerchBox13M REPORT NO. HCT-RF-2309-FC002-R3 DATE OF ISSUE September 27, 2023 Additional Model - ApplicantKEYTH INTERNATIONAL B2-#2, Horim Art Center Buliding 1., 317, Dosan-daero, Gangnam- gu, Seoul, Republic of Korea Eut Type Model Name Merch Box13_MOUSE MerchBox13M FCC ID2AZWB-MERCHBOX13M Max. RF Output Power-8.322 dBm (0.15 mW) Modulation typeGFSK FCC ClassificationFCC Part 15 Spread Spectrum Transmitter FCC Rule Part(s) Part 15 subpart C 15.247 The result shown in this test report refer only to the sample(s) tested unless otherwise stated. This test results were applied only to the test methods required by the standard. This laboratory is not accredited for the test results marked *. Report No. HCT-RF-2309-FC002-R3 F-TP22-03 (Rev. 04) Page 3 of 43 REVISION HISTORY The revision history for this test report is shown in table. Revision No. Date of Issue Description 0 September 04, 2023 Initial Release 1 September 18, 2023 Revised the Applicant information. 2 September 26, 2023 Revised the Applicant information. 3 September 27, 2023 Revised the Eut Type. Engineering Statement: The measurements shown in this report were made in accordance with the procedures indicated, and the emissions from this equipment were found to be within the limits applicable. I assume full responsibility for the accuracy and completeness of these measurements, and for the qualifications of all persons taking them. It is further stated that upon the basis of the measurements made, the equipment tested is capable of operation in accordance with the requirements of the FCC Rules under normal use and maintenance. KOLAS Statement: The above Test Report is the accredited test result by (KS Q) ISO/IEC 17025 and KOLAS(Korea Laboratory Accreditation Scheme), which signed the ILAC-MRA. (KOLAS Accreditation No. KT197) If this report is required to confirmation of authenticity, please contact to www.hct.co.kr Report No. HCT-RF-2309-FC002-R3 F-TP22-03 (Rev. 04) Page 4 of 43 CONTENTS 1. EUT DESCRIPTION 5 2. Requirements for Frequency-hopping transmitter(15.247) 6 3. TEST METHODOLOGY 6 EUT CONFIGURATION 6 EUT EXERCISE 6 GENERAL TEST PROCEDURES 7 DESCRIPTION OF TEST MODES 7 4. INSTRUMENT CALIBRATION 7 5. FACILITIES AND ACCREDITATIONS 7 FACILITIES 7 EQUIPMENT 8 6. ANTENNA REQUIREMENTS 8 7. MEASUREMENT UNCERTAINTY 9 8. DESCRIPTION OF TESTS 10 9. SUMMARY OF TEST RESULTS 25 10. TEST RESULT 26 10.1 PEAK POWER 26 10.2 BAND EDGES 27 10.3 FREQUENCY SEPARATION / OCCUPIED BANDWIDTH (99 % BW) 29 10.4 NUMBER OF HOPPING FREQUENCY 31 10.5 TIME OF OCCUPANCY (DWELL TIME) & DUTY CYCLE CORRECTION FACTOR 32 10.5.1 TIME OF OCCUPANCY (DWELL TIME) 32 10.5.2 DUTY CYCLE CORRECTION FACTOR 32 10.6 SPURIOUS EMISSIONS 34 10.6.1 CONDUCTED SPURIOUS EMISSIONS 34 10.6.2 RADIATED SPURIOUS EMISSIONS 35 10.6.3 RADIATED RESTRICTED BAND EDGES 39 11. LIST OF TEST EQUIPMENT 41 12. ANNEX A_ TEST SETUP PHOTO 43 Report No. HCT-RF-2309-FC002-R3 F-TP22-03 (Rev. 04) Page 5 of 43 1. EUT DESCRIPTION Model MerchBox13M Additional Model - EUT Type Merch Box13_MOUSE Power Supply 1.5V Frequency Range 2.4 GHz ISM band 2 402 MHz ˊ 2 480 MHz Max. RF Output Power -8.322 dBm (0.15 mW) Modulation Type GFSK Modulation Technique FHSS Number of Channels 40 Channels Channel Spacing, Bandwidth 2 MHz Antenna Specification Printed Antenna Peak Gain : -4.62 dBi Date(s) of Tests July 18, 2023 ~ September 04, 2023 EUT serial numbers Radiated: MerchBox13M-01 Conducted: MerchBox13M-02 Manufaucturer DONGGUAN UMILA SMART TECHNOLOGY CO., LTD. Building 1, No. 28, North First Street, Xiangmang West RoadQingxi town, Guan gdong China Report No. HCT-RF-2309-FC002-R3 F-TP22-03 (Rev. 04) Page 6 of 43 2. Requirements for Frequency-hopping transmitter(15.247) 1) This system is hopping pseudo-randomly. 2) Each frequency is used equally on the average by each transmitter. 3) The receiver input bandwidths that match the hopping channel bandwidths of their corresponding transmitters 4) The receiver shifts frequencies in synchronization with the transmitted signals. ▪ 15.247(g): The system, consisting of both the transmitter and the receiver, must be designed to comply with all of the regulations in this Section 15.247 should the transmitter be presented with a continuous data (or information) stream. ▪ 15.247(h): The coordination of frequency hopping systems in any other manner for the express purpose of avoiding the simultaneous occupancy of individual hopping frequencies by multiple transmitters is not permitted. The coordination of frequency hopping systems in any other manner for the express purpose of avoiding the simultaneous occupancy of individual hopping frequencies by multiple transmitters is not permitted. 3. TEST METHODOLOGY The measurement procedure described in the American National Standard of Procedures for Compliance Testing of Unlicensed Wireless Device (ANSI C63.10-2013, KDB 558074) is used in the measurement of the test device. EUT CONFIGURATION The EUT configuration for testing is installed on RF field strength measurement to meet the Commissions requirement and operating in a manner that intends to maximize its emission characteristics in a continuous normal application. EUT EXERCISE The EUT was operated in the engineering mode to fix the Tx frequency that was for the purpose of the measurem…

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