2A542AIR75PROKeyboard

此面朝外为封面→ 此面朝外为封底→ 放入OPP袋中此面朝外→ 说明书和海报（正面说明书，反面海报） 折叠尺寸：280×113mm 材质：双铜纸+4页3折 印刷：4色印刷+哑膜 展开尺寸：280×452mm Air75 V2 IC Warning This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) This device may not cause interference, and (2) This device must accept any interference, including interference that may cause undesired operation of the device. Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes: (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement * RF warning for Portable device: The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. Avertissement RF pour les appareils portables: L'appareil a été évalué et répond aux exigences générales d'exposition aux RF. L'appareil peut être utilisé dans des conditions d'exposition portables sans restriction. FCC Warning 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. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 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. 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 try to correct the interference by one or more 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 that to which the receiver is connected. -Consult the dealer or an experienced radio/TV technician for help. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction.

SHENZHEN REOSTUDIO TECHNOLOGY CO.,LTD 2.911 (d)(7)USA Agent v1.5 Section 2.911(d)(7) USA Agent for Service of Process Company name: SHENZHEN REOSTUDIO TECHNOLOGY CO.,LTD Address: Room 213-214, Internet of Things Demonstration Park, No. 6 Minhuan Road, Longhua District, Shenzhen, China Product Name: Keyboard FCC ID: 2A542AIR75PRO Model(s): Air75 V2 2.911(d)(7) USA Designated Agent for Service of Process We, [SHENZHEN REOSTUDIO TECHNOLOGY CO.,LTD] (“the applicant”) designate [JOC Australia Inc] NOTE1 for the purpose of 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 of 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 we the grantee have permanently terminated all marketing and importation of the applicable equipment within the U.S., or at 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 at the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. USA Agent Company name: JOC Australia Inc USA Address: 18351 Colima Road Ste 585 Rowland Heights,California,91748 United States of America FRN Number 0033379421 Contact Name: Benjamin.Smith Telephone No: +1(626) 217 47788 Email:[email protected]/[email protected] Applicant Company name: SHENZHEN REOSTUDIO TECHNOLOGY CO.,LTD Address: Room 213-214, Internet of Things Demonstration Park, No. 6 Minhuan Road, Longhua District, Shenzhen, China Grantee FRN Number 0032183626 FCC Grantee Code: 2A542 Contact Name: Huang zhuang hui Telephone No: 186 6592 9187 SHENZHEN REOSTUDIO TECHNOLOGY CO.,LTD 2.911 (d)(7)USA Agent v1.5 Email: [email protected] Signature: Title: Vice President Signature: Title: Manager Date: 10/19/2023 Date: 10/19/2023 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://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against- national-security-threats-to-the-communications-supply-chain-through-the

SHENZHEN REOSTUDIO TECHNOLOGY CO.,LTD Covered Equipment Certification Attestation Letter 10/26/2023 ATTN.: Reviewing Engineer FCC ID: 2A542AIR75PRO SHENZHEN REOSTUDIO TECHNOLOGY CO.,LTD (“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. Note: If the equipment for which the applicant seeks authorization is produced by any of the entities identified on the current Covered List, the applicant should include an explanation on why the equipment is not “covered” equipment. SHENZHEN REOSTUDIO TECHNOLOGY CO.,LTD (“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. Signed: Printed name: Huang zhuang hui Title: Manager Company Name: SHENZHEN REOSTUDIO TECHNOLOGY CO.,LTD Date: 10/26/2023

SHENZHEN REOSTUDIO TECHNOLOGY CO.,LTD Agent Authorization Company: SHENZHEN REOSTUDIO TECHNOLOGY CO.,LTD Address: Room 213-214, Internet of Things Demonstration Park, No. 6 Minhuan Road, Longhua District, Shenzhen, China Product Name: Keyboard Model Number(s): Air75 V2 Product Description: Keyboard 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: 2023.10.19 Name: Huang zhuang hui Title: Manager Company: SHENZHEN REOSTUDIO TECHNOLOGY CO.,LTD

SHENZHEN REOSTUDIO TECHNOLOGY CO.,LTD Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2023.10.19 Subject; Request for Confidentiality FCC ID: 2A542AIR75PRO 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. Schematic Diagram Block Diagram Operational Description 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); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. 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 issued. Sincerely, Signature: Date: 2023.10.19 Name: Huang zhuang hui Title: Manager Company: SHENZHEN REOSTUDIO TECHNOLOGY CO.,LTD

Page 1 of 3 Report No.: CTA231102005 APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Model: Air75 V2 Photo 1 Photo 2 Page 2 of 3 Report No.: CTA231102005 Photo 3 Photo 4 Page 3 of 3 Report No.: CTA231102005 Photo 5 Photo 6

FCC Label Size:30*20mm The label is printed on the shell Keyboard Air75 V2 FCC ID: 2A542AIR75PRO

Page 1 of 4 Report No.: CTA231102005 APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Model: Air75 V2 Photo 1 Photo 2 BLE+ 2.4G SRD Antenna Page 2 of 4 Report No.: CTA231102005 Photo 3 Photo 4 Page 3 of 4 Report No.: CTA231102005 Photo 5 Photo 6 Page 4 of 4 Report No.: CTA231102005 Photo 7

Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao‘an District, Shenzhen, China Any reproduction of this document must be done in full. No single part of this document may be reproduced without permission from CTA, all test data presented in this report is only applicable to presented test sample. Radio Test Report Report No.: CTA231102005H01 Issued for SHENZHEN REOSTUDIO TECHNOLOGY CO.,LTD Room 213-214, Internet of Things Demonstration Park, No. 6 Minhuan Road, Longhua District, Shenzhen, China Product Name: Keyboard Brand Name: Model Name: Air75 V2 Series Model(s): N/A FCC ID: 2A542AIR75PRO Test Standards: FCC 47CFR §2.1093 Page 2 of 9 Report No.: CTA231102005H01 TEST REPORT Applicant’s Name .................. : SHENZHEN REOSTUDIO TECHNOLOGY CO.,LTD Address ................................... : Room 213-214, Internet of Things Demonstration Park, No. 6 Minhuan Road, Longhua District, Shenzhen, China Manufacturer's Name ........... : SHENZHEN ARBITER TECHNOLOGY CO.,LTD Address ................................... : Floor 2, 3 and 4, Bldg. A, Meisheng Industrial Park, Chongqing Rd., Fuhai St., Baoan Dist., Shenzhen, Guangdong, China Product Description Product Name ......................... : Keyboard Brand Name ............................ : Model Name ........................... : Air75 V2 Series Model(s) ....................... : N/A Test Standards ...................... : FCC 47CFR §2.1093 447498 D04 Interim General RF Exposure Guidance v01 This report shall not be reproduced except in full, without the written approval of CTA, this document only be altered or revised by CTA, personal only, and shall be noted in the revision of the document. Date of Test .............................................. : Date of receipt of test item ....................... : 12 Sept. 2023 Date (s) of performance of tests .............. : 12 Sept. 2023 ~ 03 Nov. 2023 Date of Issue............................................. : 03 Nov. 2023 Test Result ................................................. : Pass Testing Engineer : (Zoey Cao) Technical Manager : (Amy Wen) Authorized Signatory : (Eric Wang) Page 3 of 9 Report No.: CTA231102005H01 TABLE OF CONTENTS 1. GENERAL INFORMATION 5 1.1 GENERAL DESCRIPTION OF THE EUT 5 1.2 TEST FACTORY 5 2. FCC 47CFR §2.1093 REQUIREMENT 6 2.1 TEST STANDARDS 6 2.2 LIMIT 6 2.3 TEST RESULT 9 Page 4 of 9 Report No.: CTA231102005H01 Revision History Rev. Issue Date Report No. Effect Page Contents 00 03 Nov. 2023 CTA231102005H01 ALL Initial Issue Page 5 of 9 Report No.: CTA231102005H01 1. GENERAL INFORMATION 1.1 GENERAL DESCRIPTION OF THE EUT Product Name Keyboard Brand Name Model Name Air75 V2 Series Model(s) N/A Model Difference N/A Product Description The EUT is Keyboard Operation Frequency: 2402~2480 MHz Modulation Type: GFSK Antenna gain: 0 dBi Antenna Designation: PCB Antenna Rating Input: DC 5V Battery Rated Voltage:3.8V Charge Limit Voltage:4.35V Capacity: 4000mAh Hardware Version F2 Pro-BT926-B-V1.0 Software Version 0xdf8f9e5b 1.2 TEST FACTORY Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community,Fuhai Street, Bao‘an District, Shenzhen, China FCC test Firm Registration Number: 517856 IC test Firm Registration Number: 27890 A2LA Certificate No.: 6534.01 IC CAB ID: CN0127 Page 6 of 9 Report No.: CTA231102005H01 2. FCC 47CFR §2.1093 REQUIREMENT 2.1 TEST STANDARDS Follow the maximum permissible exposure (MPE) limits specified in 447498 D04 Interim General Radio Frequency Exposure Guidelines v01. The gain of the antenna used in the product was extracted from the supplied antenna data sheet and the maximum total power input to the antenna was also measured. Calculate the distance from the product to the MPE limit by the formula. 2.2 LIMIT For single RF sources (i.e., any single fixed RF source, mobile device, or portable device, as defined in paragraph (b)(2) of this section): A single RF source is exempt if: (A) The available maximum time-averaged power is no more than 1 mW, regardless of separation distance. This exemption may not be used in conjunction with other exemption criteria other than those in paragraph (b)(3)(ii)(A) of Part 1.1307. Medical implant devices may only use this exemption and that in paragraph (b)(3)(ii)(A); (B) Or the available maximum time-averaged power or effective radiated power (ERP), whichever is greater, is less than or equal to the threshold Pth (mW) described in the following formula. This method shall only be used at separation distances (cm) from 0.5 centimeters to 40 centimeters and at frequencies from 0.3 GHz to 6 GHz (inclusive). Pth is given by: Page 7 of 9 Report No.: CTA231102005H01 (C) Or using below table and the minimum separation distance (R in meters) from the body of a nearby person for the frequency (f in MHz) at which the source operates, the ERP (watts) is no more than the calculated value prescribed for that frequency. For the exemption in Table 1 to apply, R must be at least λ/2π, where λ is the free-space operating wavelength in meters. If the ERP of a single RF source is not easily obtained, then the available maximum time-averaged power may be used in lieu of ERP if the physical dimensions of the radiating structure(s) do not exceed the electrical length of λ/4 or if the antenna gain is less than that of a half-wave dipole (1.64 linear value). RF Source frequency (MHz) Threshold ERP(watts) 0.3-1.34 1,920 R 2 . 1.34-30 3,450 R 2 /f 2 . 30-300 3.83 R 2 . 300-1,500 0.0128 R 2 f. 1,500-100,000 19.2R 2 . Page 8 of 9 Report No.: CTA231102005H01 For multiple RF sources: Multiple RF sources are exempt if: (A) The available maximum time-averaged power of each source is no more than 1 mW and there is a separation distance of two centimeters between any portion of a radiating structure operating and the nearest portion of any other radiating structure in the same device, except if the sum of multiple sou…

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Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao‘an District, Shenzhen, China Any reproduction of this document must be done in full. No single part of this document may be reproduced without permission from CTA, all test data presented in this report is only applicable to presented test sample. Radio Test Report Report No.: CTA231102005W02 Issued for SHENZHEN REOSTUDIO TECHNOLOGY CO.,LTD Room 213-214, Internet of Things Demonstration Park, No. 6 Minhuan Road, Longhua District, Shenzhen, China Product Name: Keyboard Brand Name: Model Name: Air75 V2 Series Model(s): N/A FCC ID: 2A542AIR75PRO Test Standards: FCC Part15.247 Page 2 of 58 Report No.: CTA231102005W02 TEST REPORT Applicant’s Name .................. : SHENZHEN REOSTUDIO TECHNOLOGY CO.,LTD Address ................................... : Room 213-214, Internet of Things Demonstration Park, No. 6 Minhuan Road, Longhua District, Shenzhen, China Manufacturer's Name ........... : SHENZHEN ARBITER TECHNOLOGY CO.,LTD Address ................................... : Floor 2, 3 and 4, Bldg. A, Meisheng Industrial Park, Chongqing Rd., Fuhai St., Baoan Dist., Shenzhen, Guangdong, China Product Description Product Name ......................... : Keyboard Brand Name ............................ : Model Name ........................... : Air75 V2 Series Model(s) ..................... : N/A Test Standards ...................... : FCC Part15.247 Test Procedure ........................ : ANSI C63.10-2013 This device described above has been tested by CTA, the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. This report shall not be reproduced except in full, without the written approval of CTA, this document may be altered or revised by CTA, personal only, and shall be noted in the revision of the document. Date of Test .............................................. : Date of receipt of test item ....................... : 12 Sept. 2023 Date (s) of performance of tests .............. : 12 Sept. 2023 ~ 27 Sept. 2023 Date of Issue ............................................. : 07 Oct. 2023 Test Result ................................................. : Pass Testing Engineer : (Zoey Cao) Technical Manager : (Amy Wen) Authorized Signatory : (Eric Wang) Page 3 of 58 Report No.: CTA231102005W02 Table of Contents 1. SUMMARY OF TEST RESULTS 6 1.1 TEST FACTORY 7 1.2 MEASUREMENT UNCERTAINTY 7 2. GENERAL INFORMATION 8 2.1 GENERAL DESCRIPTION OF THE EUT 8 2.2 DESCRIPTION OF THE TEST MODES 10 2.3 TEST SOFTWARE AND POWER LEVEL 10 2.4 BLOCK DIAGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 11 2.5 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS 12 2.6 EQUIPMENTS LIST 13 3. EMC EMISSION TEST 15 3.1 CONDUCTED EMISSION MEASUREMENT 15 3.2 TEST PROCEDURE 16 3.3 TEST SETUP 16 3.4 EUT OPERATING CONDITIONS 16 3.5 TEST RESULTS 17 4. RADIATED EMISSION MEASUREMENT 19 4.1 RADIATED EMISSION LIMITS 19 4.2 TEST PROCEDURE 21 4.3 TEST SETUP 22 4.4 EUT OPERATING CONDITIONS 22 4.5 FIELD STRENGTH CALCULATION 22 4.6 TEST RESULTS 24 5. CONDUCTED SPURIOUS & BAND EDGE EMISSION 30 5.1 LIMIT 30 5.2 TEST PROCEDURE 30 5.3 TEST SETUP 30 5.4 EUT OPERATION CONDITIONS 30 5.5 TEST RESULTS 30 6. POWER SPECTRAL DENSITY TEST 31 6.1 LIMIT 31 6.2 TEST PROCEDURE 31 Page 4 of 58 Report No.: CTA231102005W02 Table of Contents 6.3 TEST SETUP 31 6.4 EUT OPERATION CONDITIONS 31 6.5 TEST RESULTS 31 7. BANDWIDTH TEST 32 7.1 LIMIT 32 7.2 TEST PROCEDURE 32 7.3 TEST SETUP 32 7.4 EUT OPERATION CONDITIONS 32 7.5 TEST RESULTS 32 8. PEAK OUTPUT POWER TEST 33 8.1 LIMIT 33 8.2 TEST PROCEDURE 33 8.3 TEST SETUP 34 8.4 EUT OPERATION CONDITIONS 34 8.5 TEST RESULTS 34 9. ANTENNA REQUIREMENT 35 9.1 STANDARD REQUIREMENT 35 9.2 EUT ANTENNA 35 APPENDIX 1-TEST DATA 36 1. DUTY CYCLE 36 2. MAXIMUM AVERAGE CONDUCTED OUTPUT POWER 39 3. MAXIMUM PEAK CONDUCTED OUTPUT POWER 42 4. -6DB BANDWIDTH 45 5. MAXIMUM POWER SPECTRAL DENSITY LEVEL 48 6. BAND EDGE 51 7. CONDUCTED RF SPURIOUS EMISSION 54 APPENDIX 2- EUT TEST PHOTO 58 Page 5 of 58 Report No.: CTA231102005W02 Revision History Rev. Issue Date Report No. Effect Page Contents 00 07 Oct. 2023 CTA231102005W02 ALL Initial Issue Page 6 of 58 Report No.: CTA231102005W02 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: KDB 558074 D01 15.247 Meas Guidance v05r02. FCC Part 15.247,Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS -- 15.247 (a)(2) 6dB Bandwidth PASS -- 15.247 (b)(3) Output Power PASS -- 15.209 Radiated Spurious Emission PASS -- 15.247 (d) Conducted Spurious & Band Edge Emission PASS -- 15.247 (e) Power Spectral Density PASS -- 15.205 Restricted bands of operation PASS -- Part 15.247(d)/ Part 15.209(a) Band Edge Emission PASS -- 15.203 Antenna Requirement PASS -- NOTE: (1) ‘N/A’ denotes test is not applicable in this Test Report. (2) All tests are according to ANSI C63.10-2013. Page 7 of 58 Report No.: CTA231102005W02 1.1 TEST FACTORY Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community,Fuhai Street, Bao‘an District, Shenzhen, China FCC test Firm Registration Number: 517856 IC test Firm Registration Number: 27890 A2LA Certificate No.: 6534.01 IC CAB ID: CN0127 1.2 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ± U, where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2, providing a level of confidence of approximately 95 %. Test Range Measuremen t Uncertainty Radiated Emission 30~1000MHz 4.06 dB Radiated Emission 1~18GHz 5.14 dB Radiated Emission 18-40GHz 5.38 dB Conducted Disturbance 0.15~30MHz 2.14 dB Output Peak power 30MHz~18GHz 0.55 dB Power spectral density / 0.57 dB Spectrum bandwidth / 1.1% Radiated spurious emission (30MHz-1GHz) 30~1000MHz 4.10 dB Radiated spurious emission (1GHz-18GHz…

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Keyboard Antenna Specification The Keyboard antenna adopts the ultra-small PIFA antenna, and because of the limited area of PCB, the gain of antenna will be smaller than that of the other antennas. The communication distance can reach about 15 ~ 20 meters. The size of the KeyboardModule PCB antenna is 11.74 * 3.45mm, and the thickness of PCB is 1.6mm.The specific sizeof the antenna is shown in figure 1, the physical object is shown in figure 2. Figure1 Keyboard Antenna size small PCB antenna, and because of the limited Figure2 Keyboard Antenna The antenna's S11 test data is shown in figure 3, covering the entire 2.4 Gfrequency band. Figure3 Keyboard Antenna S11 Antenna describe: Antenna plate PCB Antenna Antenna gain 0dBi Frequency range 2402-2480MHz Connector type direct Radiation [email protected] Total Average Gain：-0.325dbi \ Phi 0 45 90 135 180 235 270 315 Gain -0. 1 -0.4 -0.2 -0.6 -0.2 -0. 6 -0.7 -0.5 Radiation [email protected] Total Average Gain：-0.229dbi \ Phi 0 45 90 135 180 235 270 315 Gain 0 -0.1 -0. 3 -0. 6 -0.1 -0.2 -0.6 -0.4 Radiation [email protected] Total Average Gain：-0.471dbi \ Phi 0 45 90 135 180 235 270 315 Gain 0 -0.1 -0. 3 -0. 6 -0.1 -0.2 -0.6 -0.4

Page 1 of 2 FCC ID: 2A542AIR75PRO DTS_DSS Setup photo Model name: Air75 V2 DTS_DSS radiation L DTS_DSS radiation H Page 2 of 2 FCC ID: 2A542AIR75PRO DTS_DSS conduction