ZHK-M031Wireless Mouse

U.S. Agent for Service of Process Attestation To the attention of Federal Communications Commission Authorization and Evaluation Division Designated U.S Agent Company Name: GN Audio USA Inc. Contact Name: Steen Kaiser FRN: 0033478405 Street Address: 900 Chelmsford Street, Tower II, 8th Floor, Lowell, MA 01851, USA Telephone No: (800) 826-4656 Email: [email protected] This letter is to confirm that we have accepted the responsibility to act as the designated U.S. Agent for service of process as required by §2.911(d)(7) on behalf of the Applicant noted below. U.S. Agent Signature: Date: 2026-04-13 Signed by: Steen Kaiser Applicant Company Name: GN Audio USA Inc. Grantee Code: ZHK FRN: 0033478405 Contact Name: Chirky Lin Street Address: 900 Chelmsford Street, Tower II, 8th Floor, Lowell, MA 01851, USA Telephone No: Chirky Lin Email: [email protected] This letter is to confirm that the Applicant has designated the U.S Agent noted above for the purpose of accepting service of process on their behalf as required by §2.911(d)(7).The Applicant further acknowledges acceptance 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. ApplicantSignature: Date: 2026-04-13 Signed by: Chirky Lin

Date:2026-02-25 FCC ID:ZHK-M031 To the attention of Federal Communications Commission Authorization and Evaluation Division Attestation Statements Attestation Statements Part 2.911(d)(5)(i) Filing GN Audio USA Inc.certifies that the equipment for which authorization is soughtis not “covered” equipment prohibited from receivingan equipment authorization pursuant to section 2.903 of the FCC rules. Attestation Statements Part 2.911(d)(5)(ii) Filing GN Audio USA Inc.certifies that, as of the date of the filing of the application, the applicantis notidentified on the Covered List as an entity producing “covered” equipment. Sincerely yours, ----------------------------------------------- Printed name: Chirky Lin Title: Senior Regulatory Manager Tel No.:886-2-8226-3858#317 Fax No.:886-2-8226-3626 E-mail:[email protected]

Date:2026-02-25 FCC ID:ZHK-M031 To the attention of Federal Communications Commission Authorization and Evaluation Division PermanentConfidentiality Request Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, the Applicant hereby requests confidential treatment of information accompanying this Application as outlined below: Schematics Block Diagram Operational Description The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these matters might be harmful to the Applicant and provide unjustified benefits to its competitors. The Applicant understands that pursuant to Rule 0.457, disclosure of this Application and all accompanying documentation will not be made before the date of the Grant for this application. Sincerely yours, ----------------------------------- Printed name: Chirky Lin Title: Senior Regulatory Manager Tel No.:886-2-8226-3858#317 Fax No.:886-2-8226-3626 E-mail:[email protected]

Date:2026-02-25 FCC ID:ZHK-M031 To the attention of Federal Communications Commission Authorization and Evaluation Division Confidentiality Request Pursuant toSections 0.457 and 0.459of the commission’srules,we request short-termconfidentialtreatment for the following information until2026/6/8 in order to ensure sensitive business information remains confidential until the actual marketing of the device: External photos Test Setup photos User’s manual Internal Photos Sincerely yours, ----------------------------------- Printed name: Chirky Lin Title: Senior Regulatory Manager Tel No.:886-2-8226-3858#317 Fax No.:886-2-8226-3626 E-mail:[email protected]

Date:2026-02-25 FCC ID:ZHK-M031 AUTHORIZATION LETTER ToWhomItMayConcern: GN Audio USA Inc.hereby authorizesAndrea Hsia/Assistant Managerof Bureau Veritas Consumer Products Services (H.K.) Ltd., Taoyuan Branch(“BV CPS Taoyuan”),to act on its behalf in all matters relating to theFederal Communication Commission (“FCC”) application for equipment authorization in connection with the FCC ID listed above, including signing of all documents relating to these matters. Any and all acts carried out byAndrea Hsia/Assistant Managerof BV CPS Taoyuan onGN Audio USA Inc.’s behalf, within the scope of the powers granted herein, shall have the same effect as acts of its own. If you have any questions regarding the authorization, please don’t hesitate to contact us. Sincerely yours, ----------------------------------------------- Printed name: Chirky Lin Title: Senior Regulatory Manager Tel No.:886-2-8226-3858#317 Fax No.:886-2-8226-3626 E-mail:[email protected]

Report No.: MFBGYQ-WTW-P25110655 Page No. 1 / 8Report Format Version: 7.1.0 RF EXPOSURE REPORT CERTIFICATE OF CONFORMITY FCC Rule Part: FCC Part 2 (Section 2.1093) Report No.: MFBGYQ-WTW-P25110655 FCC ID: ZHK-M031 Product: Wireless Mouse Brand: steelseries Model No.: M-031 Received Date: 2025/12/9 Test Date: 2026/3/11 Issued Date: 2026/4/7 Applicant: GN Audio USA Inc. Address: 900 Chelmsford Street, Tower II, 8th Floor, Lowell, MA 01851, USA Issued By: Bureau Veritas Consumer Products Services (H.K.) Ltd., Taoyuan Branch Lin Kou Laboratories Lab Address: No. 47-2, 14th Ling, Chia Pau Vil., Lin Kou Dist., New Taipei City, Taiwan Test Location: No. 19, Hwa Ya 2nd Rd., Wen Hwa Vil., Kwei Shan Dist., Taoyuan City 33383, Taiwan FCC Registration / Desi gnation Number: 788550 / TW0003 Approved by: , Date:2026/4/7 Jeremy Lin / Project Engineer This test report consists of 8 pages in total. It may be duplicated completely for legal use with the approval of the applicant. It should not be reproduced except in full, without the written approval of our laboratory. The test results in the report only apply to the tested sample. The test results in this report are traceable to the national or international standards. Prepared by : Polly Chien / Specialist This report is governed by, and incorporates by reference, the Conditions of Testing as posted at the date of issuance of this report at http://www.bureauveritas.com/home/about-us/our- business/cps/about-us/terms-conditions/ and is intended for your exclusive use. Any copying or replication of this report to or for any other person or entity, or use of our name or trademark, is permitted only with our prior written permission. This report sets forth our findings solely with respect to the test samples identified herein. The results set forth in this report are not indicative or representative of the quality or characteristics of the lot from which a test sample was taken or any similar or identical product unless specifically and expressly noted. Our report includes all of the tests requested by you and the results thereof based upon the information that you provided to us. Measurement uncertainty is only provided upon request for accredited tests. Statements of conformity are based on simple acceptance criteria without taking measurement uncertainty into account, unless otherwise requested in writing. You have 60 days from date of issuance of this report to notify us of any material error or omission caused by our negligence or if you require measurement uncertainty; provided, however, that such notice shall be in writing and shall specifically address the issue you wish to raise. A failure to raise such issue within the prescribed time shall constitute your unqualified acceptance of the completeness of this report, the tests conducted and the correctness of the report contents. Report No.: MFBGYQ-WTW-P25110655 Page No. 2 / 8Report Format Version: 7.1.0 Table of Contents Release Control Record ....................................................................................................................................................... 3 1 Certificate .................................................................................................................................................................... 4 2 Applicable RF Exposure Limit .................................................................................................................................. 5 3 Test Results ................................................................................................................................................................ 6 4 Conclusion .................................................................................................................................................................. 7 5 Information of the Testing Laboratories .................................................................................................................. 8 Report No.: MFBGYQ-WTW-P25110655 Page No. 3 / 8Report Format Version: 7.1.0 Release Control Record Issue No. Description Date Issued MFBGYQ-WTW-P25110655 Original release. 2026/4/7 Report No.: MFBGYQ-WTW-P25110655 Page No. 4 / 8Report Format Version: 7.1.0 1 Certificate Product: Wireless Mouse Brand: steelseries Test Model: M-031 Sample Status: Engineering sample Applicant: GN Audio USA Inc. Test Date: 2026/3/11 FCC Rule Part: FCC Part 2 (Section 2.1093) Standard: KDB 447498 D04 Interim General RF Exposure Guidance v01 The above equipment has been tested by Bureau Veritas Consumer Products Services (H.K.) Ltd., Taoyuan Branch, and found compliance with the requirement of the above standards. The test record, data evaluation & Equipment Under Test (EUT) configurations represented herein are true and accurate accounts of the measurements of the sample’s RF characteristics under the conditions specified in this report. Report No.: MFBGYQ-WTW-P25110655 Page No. 5 / 8Report Format Version: 7.1.0 2 Applicable RF Exposure Limit § 1.1310 Radiofrequency radiation exposure limits. (a) Specific absorption rate (SAR) shall be used to evaluate the environmental impact of human exposure to radiofrequency (RF) radiation as specified in § 1.1307(b) of this part within the frequency range of 100 kHz to 6 GHz (inclusive). (b) The SAR limits for occupational/controlled exposure are 0.4 W/kg, as averaged over the whole body, and a peak spatial-average SAR of 8 W/kg, averaged over any 1 gram of tissue (defined as a tissue volume in the shape of a cube). Exceptions are the parts of the human body treated as extremities, such as hands, wrists, feet, ankles, and pinnae, where the peak spatial-average SAR limit for occupational/controlled exposure is 20 W/kg, averaged over any 10 grams of tissue (defined as a tissue volume in the shape of a cube). Exposure may be averaged over a time period not to exceed 6 minutes to determine compliance with occupational/controlled SAR limits. (c) The SAR …

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CONFIDENTIAL Filtered Vivaldi Module SPARKMicrosystems 1751 Rue Richardson, Suite 3.300 Montreal, QC H3K 1G6 CONFIDENTIAL Tuesday 13 th August, 2024 CONFIDENTIAL Abstract This primer outlines the specifications and features of compact Vivaldi antenna which has an integrated low pass filter which aims to provide a unified hardware solution for all regulatory regions. Contents 1General Description2 2Simulated Performance3 3Simulated Radiation Patterns4 1 CONFIDENTIAL CONFIDENTIAL - DO NOT DISTRIBUTESPARK Microsystems 1General Description The differential Vivaldi antenna module is designed to offer a straightforward, modular integration for a variety of Ultra- Wideband (UWB) applications. This updated innovative design incorporates a compact low-pass filter within the antenna module itself, allowing users to achieve certification across different regulatory regions with a single hardware. The RF front-end features a differential low-pass filter that connects directly to the dual Vivaldi antenna, as depicted in Fig. 1. When excited differentially, the system functions as a unified differential antenna, showcasing a dipole-like radiation pattern and linear polarization. This balanced circuit design enables direct connection to the SR1020 radio chip’s output pins (RFN-RFP) without the need for a balun. The module is constructed on a 4-layer FR4 PCB, characterized by a relative permittivity of 4.4 and a total thickness of 0.98mm as shown in Fig. 2. Figure 1: Filtered Vivaldi antenna module. Figure 2: Multi layer stackup. Filtered Vivaldi Module2 CONFIDENTIAL CONFIDENTIAL - DO NOT DISTRIBUTESPARK Microsystems 2Simulated Performance The simulated differentialS 11 of the RF front-end is presented in Fig. 3. As it can be observed, the -10 dB impedance cutoff is at about 6.1 GHz for this module. Figure 3: SimulatedS 11 result of the RF front-end. The efficiency of the antenna’s radiation is determined by calculating the ratio of the power radiated by the antenna to the power received at its input, as shown in Fig. 4. This method is particularly precise as it accounts for any impedance mismatches and the insertion losses from the feed lines and filter. The combined radiation efficiency and filter insertion loss stay under 1.5 dB across the relevant frequency range. Fig. 5 illustrates the peak realized gain of the antenna, reaching a maximum of approximately 1.8 dB at 9 GHz, including losses. These figures also demonstrate the antenna’s filtering capability, effectively rejecting signals below 6 GHz and above 10.5 GHz. This selective filtering ensures meeting certification requirements for out of band emissions. Figure 4: Radiation efficiency of the Vivaldi dongle antenna.Figure 5: Peak realized gain of the Vivaldi dongle antenna. Filtered Vivaldi Module3 CONFIDENTIAL CONFIDENTIAL - DO NOT DISTRIBUTESPARK Microsystems 3Simulated Radiation Patterns The radiation pattern of the module is plotted for the XY, XZ, and YZ cuts from 6.75 to 8.75 GHz in Fig. 6-8. It has to be noted that these patterns have been obtained from free space simulation. The radiation pattern of the antenna will be different in a specific product and will be affected by the elements around it. Figure 6: Realized gain (dB) (xy-plane).Figure 7: Realized gain (dB) (xz-plane). Figure 8: Realized gain (dB) (yz-plane).Figure 9: 3D radiation pattern at 7.5 GHz. Filtered Vivaldi Module4 Freq [GHz]dB(PeakRealizedGain) []Freq [GHz]dB(PeakRealizedGain) 2.7-27.141410892.7-27.11342323 2.701-27.12983092.701-27.10181544 2.702-27.118250912.702-27.09020764 2.703-27.106670912.703-27.07859984 2.704-27.095090922.704-27.06699204 2.705-27.083510932.705-27.05538424 2.706-27.071930942.706-27.04377644 2.707-27.060350952.707-27.03216864 2.708-27.048770962.708-27.02056084 2.709-27.037190962.709-27.00895305 2.71-27.025610972.71-26.99734525 2.711-27.014030982.711-26.98573745 2.712-27.002450992.712-26.97412965 2.713-26.9908712.713-26.96252185 2.714-26.9792912.714-26.95091405 2.715-26.967711012.715-26.93930625 2.716-26.956131022.716-26.92769846 2.717-26.944551032.717-26.91609066 2.718-26.932971042.718-26.90448286 2.719-26.921391052.719-26.89287506 2.72-26.909811052.72-26.88126726 2.721-26.898231062.721-26.86965946 2.722-26.886651072.722-26.85805166 2.723-26.875071082.723-26.84644386 2.724-26.863491092.724-26.83483607 2.725-26.85191112.725-26.82322827 2.726-26.84033112.726-26.81162047 2.727-26.828751112.727-26.80001267 2.728-26.817171122.728-26.78840487 2.729-26.805591132.729-26.77679707 2.73-26.794011142.73-26.76518927 2.731-26.782431142.731-26.75358147 2.732-26.770851152.732-26.74197368 2.733-26.759271162.733-26.73036588 2.734-26.747691172.734-26.71875808 2.735-26.736111182.735-26.70715028 2.736-26.724531192.736-26.69554248 2.737-26.712951192.737-26.68393468 2.738-26.70137122.738-26.67232688 2.739-26.689791212.739-26.66071908 2.74-26.678211222.74-26.64911129 2.741-26.666631232.741-26.63750349 2.742-26.655051232.742-26.62589569 2.743-26.643471242.743-26.61428789 2.744-26.631891252.744-26.60268009 2.745-26.620311262.745-26.59107229 2.746-26.608731272.746-26.57946449 2.747-26.597151282.747-26.5678567 2.748-26.585571282.748-26.5562489 2.749-26.573991292.749-26.5446411 2.75-26.56241132.75-26.5330333 2.751-26.550831312.751-26.5214255 Port 1Port 2 2700to10600MHz 2.752-26.539251322.752-26.5098177 2.753-26.527671322.753-26.4982099 2.754-26.516091332.754-26.4866021 2.755-26.504511342.755-26.47499431 2.756-26.492931352.756-26.46338651 2.757-26.481351362.757-26.45177871 2.758-26.469771372.758-26.44017091 2.759-26.458191372.759-26.42856311 2.76-26.446611382.76-26.41695531 2.761-26.435031392.761-26.40534751 2.762-26.42345142.762-26.39373971 2.763-26.411871412.763-26.38213192 2.764-26.400291422.764-26.37052412 2.765-26.388711422.765-26.35891632 2.766-26.377131432.766-26.34730852 2.767-26.365551442.767-26.33570072 2.768-26.353971452.768-26.32409292 2.769-26.342391462.769-26.31248512 2.77-26.330811462.77-26.30087732 2.771-26.319231472.771-26.28926953 2.772-26.307651482.772-26.27…

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Report No.: RFBGYQ-WTW-P25110655 Page No. 1 / 37 Report Format Version: 6.1.1 FCC Test Report Report No.: RFBGYQ-WTW-P25110655 FCC ID: ZHK-M031 Model No.: M-031 Received Date: 2025/12/9 Test Date: 2026/2/24 ~ 2026/3/5 Issued Date: 2026/4/7 Applicant: GN Audio USA Inc. Address: 900 Chelmsford Street, Tower II, 8th Floor, Lowell, MA 01851, USA Issued By: Bureau Veritas Consumer Products Services (H.K.) Ltd., Taoyuan Branch Lin Kou Laboratories Lab Address: No. 47-2, 14th Ling, Chia Pau Vil., Lin Kou Dist., New Taipei City, Taiwan, Test Location: No. 19, Hwa Ya 2nd Rd., Wen Hwa Vil., Kwei Shan Dist., Taoyuan City 33383, Ta i w a n FCC Registration / Designation Number: 788550 / TW0003 This report is governed by, and incorporates by reference, the Conditions of Testing as posted at the date of issuance of this report at http://www.bureauveritas.com/home/about-us/our-business/cps/about-us/terms-conditions/ and is intended for your exclusive use. Any copying or replication of this report to or for any other person or entity, or use of our name or trademark, is permitted only with our prior written permission. This report sets forth our findings solely with respect to the test samples identified herein. The results set forth in this report are not indicative or representative of the quality or characteristics of the lot from which a test sample was taken or any similar or identical product unless specifically and expressly noted. Our report includes all of the tests requested by you and the results thereof based upon the information that you provided to us. Measurement uncertainty is only provided upon request for accredited tests. Statements of conformity are based on simple acceptance criteria without taking measurement uncertainty into account, unless otherwise requested in writing. Yo u have 60 days from date of issuance of this report to notify us of any material error or omission caused by our negligence or if you require measurement uncertainty; provided, however, that such notice shall be in writing and shall specifically address the issue you wish to raise. A failure to raise such issue within the prescribed time shall constitute your unqualified acceptance of the completeness of this report, the tests conducted and the correctness of the report contents. Report No.: RFBGYQ-WTW-P25110655 Page No. 2 / 37 Report Format Version: 6.1.1 Table of Contents Release Control Record .................................................................................................................................. 3 1. Certificate of Conformity ...................................................................................................................... 4 2. Summary of Test Results ..................................................................................................................... 5 2.1 Measurement Uncertainty ................................................................................................................... 5 2.2 Modification Record ............................................................................................................................ 5 3. General Information .............................................................................................................................. 6 3.1 General Description of EUT ................................................................................................................ 6 3.2 Description of Test Modes ................................................................................................................... 7 3.2.1 Test Mode Applicability and Tested Channel Detail ............................................................................. 7 3.3 Duty cycle of test signal. ..................................................................................................................... 9 3.4 Description of Support Units ............................................................................................................. 10 3.4.1 Configuration of System under Test .................................................................................................. 10 3.5 General Description of Applied Standards ........................................................................................ 10 4. Test Types and Results ....................................................................................................................... 11 4.1 Radiated Emissions ........................................................................................................................... 11 4.1.1 Limits of Radiated Emission Measurement - at or Below 960 MHz ................................................... 11 4.1.2 Limits of Radiated Emission Measurement - Above 960 MHz .......................................................... 12 4.1.3 Test Instruments ................................................................................................................................ 15 4.1.4 Test Procedures ................................................................................................................................. 16 4.1.5 Deviation from Test Standard ............................................................................................................ 16 4.1.6 Test Setup .......................................................................................................................................... 17 4.1.7 EUT Operating Conditions ................................................................................................................. 18 4.1.8 Test Results ....................................................................................................................................... 19 4.2 UWB Bandwidth Measurement ......................................................................................................... 31 4.2.1 Limits of Transmitter Power and Power Spectral Density Measurement .................…

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