GT3SCI03Rear Remote Controller

7RJRVKL FKRPH6KLQDJDZDNX7RN\R-DSDQ Tel: +81-3-3785-1111 Fax: +81-3-3785-1068 Date: June 17, 2026 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 RE: CFR 47 §2.911 (d)(5) Attestation FCC ID: GT3SCI03 SMK Corporation(“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 FCC rules. SMK Corporation(“the applicant”) certifies that, the device does not have cybersecurity and / or anti-virus software produced or provided byKaspersky Lab, Inc.or any of its successors and assignees, identified on the Covered Listinstalled on the device, nor will it be installed by the applicant anytime after certification. SMK Corporation(“the applicant”) certifies that the RF device is not a router “produced in a foreign country”. SMK Corporation(“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered Listas an entity producing “covered” equipment and is not an affiliate or subsidiaryof an entity identified on the Covered List. Sincerely yours, Ryo Sasaki SMK Corporation

U.S.A *DWHZD\3ODFH6XLWH6DQ-RVH&DOLIRUQLD86$ Tel: 1-408-436-2206 Date: May 25, 2026 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 RE: CFR 47 §2.911 (d)(7) FCC US Agent Letter of Attestation FCC ID: GT3SCI03 Grantee FRN: 0015266521 To whom it may concern: This letter is to confirm that we have accepted the responsibility to act as US Agent on behalf of SMK Corporation(“the applicant”) for the above referenced FCC ID. We are aware of the requirements and responsibilities of the applicant’s agent for service of process as outlined in the FCC section §2.911(d)(7) and Report and Order FCC 22-84 paragraph 63. FCC US Agent Contact Person: Shaun Takeuchi Company Name: SMK Electronics Corporation, U.S.A. FRN: 0038360400 Company Address: 2077 Gateway Pl. San Jose CA San Jose CALIFORNIA 95110 USA Email: [email protected] Sincerely yours, 㻌㻌㻌㻌㻌㻌㻌㻌 Shaun Takeuchi SMK Electronics Corporation, U.S.A. 㻌㻌㻌㻌㻌㻌 ShT khi

7RJRVKLFKRPH6KLQDJDZDNX7RN\R-DSDQ Tel: +81-3-3785-1111 Fax: +81-3-3785-1068 Date: May 25, 2026 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 RE: CFR 47 §2.911 (d)(7) Agent Designation Attestation FCC ID: GT3SCI03 Grantee FRN: 0015266521 SMK Corporation(“the applicant”) as required by section §2.911(d)(7), designates the following agent, located in the United States, for purposes of acting as the applicant’s agent for service of process. The applicant acknowledges that they will 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. The applicant further acknowledges their responsibility under CFR 47 §2.929(c) to inform the FCC whenever the agent information changes. U.S. Agent Information: Contact Person: Shaun Takeuchi Company Name: SMK Electronics Corporation, U.S.A. FRN: 0038360400 Company Address: 2077 Gateway Pl. San Jose CA San Jose CALIFORNIA 95110 USA Email: [email protected] Sincerely yours, Ryo Sasaki SMK Corporation RS ki

7RJRVKL FKRPH6KLQDJDZDNX7RN\R-DSDQ Tel: +81-3-3785-1111 Fax: +81-3-3785-1068 Authorization Letter May 25, 2026 UL Verification Services Inc. 47173 Benicia Street, Fremont, CA 94538 FCC ID:GT3SCI03 Applicant: SMK Corporation To whom it may concern: We, the undersigned, hereby authorize Miki Murasato of Consumer, Medical & Information Technologies Division, UL Japan, Inc. 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 UL Japan, Inc. 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. 862. This authorization is valid until further written notice from the applicant. The application for the subject equipment has not been submitted to another TCB for certification. Sincerely, ______________________________ Ryo Sasaki SMK Corporation ________________ Ryo Sasaki

7RJRVKL FKRPH6KLQDJDZDNX7RN\R-DSDQ Tel: +81-3-3785-1111 Fax: +81-3-3785-1068 Request for Long-Term Confidentiality May 25, 2026 UL Verification Services Inc. 47173 Benicia Street, Fremont, CA 94538 FCC ID:GT3SCI03 Applicant: SMK Corporation To whom it may concern: Please be advised that the following information is to be held confidential on behalf of us, referring to the FCC rules 0.457 and 0.459: Block Diagram Operational Description Schematics The application contains technical information which we deem to be trade secrets and proprietary. If made public, the information might be used to the disadvantage of the applicant in the marketplace. Thank you for your attention to this matter. Sincerely, ______________________________ Ryo Sasaki SMK Corporation _______________ Ryo Sasaki

7RJRVKLFKRPH6KLQDJDZDNX7RN\R-DSDQ Tel: +81-3-3785-1111 Fax: +81-3-3785-1068 Request for Short-Term Confidentiality May 25, 2026 UL Verification Services Inc. 47173 Benicia Street, Fremont, CA 94538 FCC ID:GT3SCI03 Applicant: SMK Corporation To whom it may concern: Please be advised that the following information is to be held in confidence for 180 days from the date of the Grant of Equipment Authorization based on the FCC rules 0.457 and 0.459: External Photos Internal Photos Test Setup Photos User Manual The application contains technical information, which we deem to be trade secrets and proprietary. If made public, the information might be used to the disadvantage of the applicant in the marketplace. Thank you for your attention to this matter. Sincerely, ______________________________ Ryo Sasaki SMK Corporation ____________________________________ Ryo Sasaki

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UL Japan, Inc. Kashima EMC Lab 1614 Mushihata, Katori-shi, Chiba 289-0341 Japan T: +81.478.88.6500 / F: +81.478.82.3373 / W: japan.ul.com June 18, 2026 FCC ID: GT3SCI03 To whom it may concern, We, UL Japan, Inc, hereby declare that Rear Remote Controller, model: AT2603 (FCC ID: GT3SCI03) of SMK CORPORATION is exempt from RF exposure SAR evaluation as its output power meets the exclusion limits stated in KDB 447498D01(v06). KDB 447498D01(v06) has the following exclusion for portable devices: The 1g and 10g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ꞏ[√f(GHz)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, where •f(GHz) is the RF channel transmit frequency in GHz •Power and distance are rounded to the nearest mW and mm before calculation •The result is rounded to one decimal place for comparison The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. This device has f = 2.48 GHz and distance = 5 mm (minimum separation distance: 5 mm was used in the calculation) and the maximum average output power (Burst power average) was 1 mW So for this device: 1 mW[maximum average output power]/5 mm[minimum separation distance]*√2.48 = 0.3 *This is less than 3.0, so no SAR is required. Even taking into account the tolerance, this device can be satisfied with the limits. Thank you for your attention to this matter. Kazuhiro Ando Engineer

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Test Report No. 16263533M-A-R1 Page 1 of 33 UL Japan, Inc. Kashima EMC Lab. 1614, Mushihata, Katori-shi, Chiba-ken, 289-0341 Japan / +81-478-88-6500 RADIO TEST REPORT Test Report No. 16263533M-A-R1 CustomerSMK CORPORATION Description of EUT Rear Remote Controller Model Number of EUT AT2603 FCC ID GT3SCI03 Test Regulation FCC Part 15 Subpart C Test Result Complied Issue Date June 29, 2026 Remarks- Representative Test Engineer Approved By Hiromitsu Tanabe Engineer Kazuhiro Ando Engineer CERTIFICATE 1266.01 The testing in which "Non-accreditation" is displayed is outside the accreditation scopes in UL Japan, Inc. There is no testing item of "Non-accreditation". Rep ort Cover Page - Form-ULID-003532 (DCS:13-EM-F0429) Issue# 26.0 Test Report No. 16263533M-A-R1 Page 2 of 33 UL Japan, Inc. Kashima EMC Lab. 1614, Mushihata, Katori-shi, Chiba-ken, 289-0341 Japan / +81-478-88-6500 ANNOUNCEMENT REVISION HISTORY Revision Test Report No. Date Page Revised Contents - (Original) 16263533M-A June 18, 2026 - 1 16263533M-A-R1 June 29, 2026 SECTION 5, Figure 1; - Correction of the typo of the Test Distance in the calculation for 1 GHz to 10 GHz: From “4.44 m” to “3.0 m”  This test report shall not be reproduced in full or partial, without the written approval of UL Japan, Inc.  The results in this report appl y only to the sample tested. (Laboratory was not involved in sampling.)  This sample tested is in compliance with the limits of the above re gulation.  The test results in this test report are traceable to the national or international standards.  This test report must not be used by the customer to claim product certification, approval, or endorsement b y the A2LA accreditation body.  This test report covers Radio technical requirements. It does not cover administrative issues such as Manual or non-Radio test related Requirements. (if applicable)  The all test items in this test report are conducted b y UL Japan, Inc. Kashima EMC Lab.  The opinions and the interpretations to the result of the description in this report are outside scopes where UL Japan, Inc. has been accredited.  The information provided b y the customer for this report is identified in SECTION 1.  The laboratory is not responsible for information provided by the customer which can impact the validit y of the results.  For any test report referred in this report, the latest version (including any revisions) is always referred to.  If the latest version is a revision, it replaces the previous version. See the table below for revisions and versions. Test Report No. 16263533M-A-R1 Page 3 of 33 UL Japan, Inc. Kashima EMC Lab. 1614, Mushihata, Katori-shi, Chiba-ken, 289-0341 Japan / +81-478-88-6500 Reference: Abbreviations (Including words undescribed in this report) A2LA The American Association for Laboratory Accreditation IEC International Electrotechnical Commission AC Alternating Current IEEE Institute of Electrical and Electronics Engineers AFH Adaptive Frequency Hopping IF Intermediate Frequency AM Amplitude Modulation ILAC International Laboratory Accreditation Conference Amp, AMP Amplifier ISED Innovation, Science and Economic Development Canada ANSI American National Standards Institute ISO International Organization for Standardization Ant, ANT Antenna JAB Japan Accreditation Board AP Access Point LAN Local Area Network ASK Amplitude Shift Keying LIMS Laboratory Information Management System Atten., ATT Attenuator MCS Modulation and Coding Scheme AV Average MRA Mutual Recognition Arrangement BPSK Binary Phase-Shift Keying N/A Not Applicable BR Bluetooth Basic Rate NIST National Institute of Standards and Technology BT Bluetooth NS No signal detect. BT LE Bluetooth LE NSA Normalized Site Attenuation BW BandWidth NVLAP National Voluntary Laboratory Accreditation Program Cal Int Calibration Interval OBW Occupied Band Width CCK Complementary Code Keying OFDM Orthogonal Frequency Division Multiplexing Ch., CH Channel OFDMA Orthogonal Frequency Division Multiple Access CISPR Comite International Special des Perturbations Radioelectriques P/M Power meter CW Continuous Wave PCB Printed Circuit Board DBPSK Differential BPSK PER Packet Error Rate DC Direct Current PHY Physical Layer D-factor Distance factor PK Peak DFS Dynamic Frequency Selection PN Pseudo random Noise DQPSK Differential QPSK PP Preamble Puncturing DSSS Direct Sequence Spread Spectrum PRBS Pseudo-Random Bit Sequence EDR Enhanced Data Rate PSD Power Spectral Density EIRP, e.i.r.p. Equivalent Isotropically Radiated Power QAM Quadrature Amplitude Modulation EMC ElectroMagnetic Compatibility QP Quasi-Peak EMI ElectroMagnetic Interference QPSK Quadri-Phase Shift Keying EN European Norm RBW Resolution Band Width ERP, e.r.p. Effective Radiated Power RDS Radio Data System EU European Union RE Radio Equipment EUT Equipment Under Test RF Radio Frequency Fac. Factor RMS Root Mean Square FCC Federal Communications Commission RSS Radio Standards Specifications FHSS Frequency Hopping Spread Spectrum Rx Receiving FM Frequency Modulation SA, S/A Spectrum Analyzer Freq. Frequency SG Signal Generator FSK Frequency Shift Keying SVSWR Site-Voltage Standing Wave Ratio GFSK Gaussian Frequency-Shift Keying TR Test Receiver GNSS Global Navigation Satellite System Tx Transmitting GPS Global Positioning System VBW Video BandWidth Hori. Horizontal Vert. Vertical ICES Interference-Causing Equipment Standard WLAN Wireless LAN Test Report No. 16263533M-A-R1 Page 4 of 33 UL Japan, Inc. Kashima EMC Lab. 1614, Mushihata, Katori-shi, Chiba-ken, 289-0341 Japan / +81-478-88-6500 CONTENTS PAGE SECTION 1: Customer Information ........................................................................... 5 SECTION 2: Equipment Under Test (EUT) ................................................................ 5 SECTION 3: Test Summary ........................................................................................ 6 SECTION 4: Operation of EUT during testing ....................................…

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