2A8BYRJ-758Wireless keyboard

Brightness down Brightness up Desktop Multi-Window Preview Show Desktop Web/Home Search Previous Track Play/Pause Next Track Mute Volume down Volume up Screen Lock Delete Calculator 393g FCC Information and Copyright 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. 15.19 Labelling requirements. 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. changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. FCC RF warning statement: the device has been evaluated to meet general RF exposure requirement , The device can be used in portable exposure condition without restriction.

C5266091_X8_Ed.1 1/1 Letter of Authorization Dongguan Ruijun Electronics Company Company: Dongguan Ruijun Electronics Company Address: No.6, 17th Alley, Wenming Road, Fourth Area of Nanzha, Humen Town, Dongguan City, Guangdong, China. Product Name: Wireless keyboard Model Number: RJ-758 FCC Identifier: 2A8BYRJ-758 We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Sheila Sheila Date: 2022-08-16 Title: Manager Signature of applicant:

C5266091_X10_Ed.2 1/1 Dongguan Ruijun Electronics Company Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 2022-08-16 Subject: Request for Confidentiality FCC ID: 2A8BYRJ-758 To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules (47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. Exhibits Long-Term Confidentiality Short-Term Confidentiality NOTE 2 ID Label/Location No No Attestation Statement No No External Photos No ☐ Block Diagram ■☐ Schematics ■☐ Test Report No No Test Setup Photos No ☐ User’s Manual ☐ NOTE 1 ☐ Internal Photos ☐ NOTE 1 ☐ Parts List / Tune Up ☐ ☐ RF Exposure Info No No Operational Description ■ ☐ Cover Letter(s) No No SDR Software / Security Info ☐ No NOTE 1: Long‐Term Confidentiality may be permitted under special conditions (See II. LONG‐TERM CONFIDENTIALITY, Section 3 of KDB 726920, use last in force) NOTE 2: Short‐Term Confidentiality can be requested for a maximum of 180 days from the date of the grant. Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. In case of short-term Confidentiality, the applicant requests the exhibits selected above are withheld from public view for a period of ______ days from the date of the Grant of Equipment Authorization and prior to marketing. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. C5266091_X10_Ed.2 1/1 Sincerely, Name: Sheila Sheila Date: 2022-08-16 Title: Manager Signature of applicant:

Shenzhen HTT Technology Co., Ltd. Report No.: HTT202207306F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 1 of 3 EUT Constructional Details External Photo Label&location Report No.: HTT202207306F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 2 of 3 Report No.: HTT202207306F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 3 of 3 ------End------

Shenzhen HTT Technology Co., Ltd. Report No.: Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 1 of 3 EUT Constructional Details Internal Photo HTT202207306F01 Report No.: HTT202207306F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 2 of 3 Report No.: HTT202207306F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 3 of 3 ------End------ PCB antenna

FCC ID :2A8BYRJ-758 RF EXPOSURE EVALUATION METHOD Frequency Maximum measured transmitter power. The 1-g and 10-g 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)] · [√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 Approximate SAR Test Exclusion Power Thresholds at Selected Frequencies and Test Separation Distances are illustrated in the following FCC ID: 2A8BYRJ-758 According to KDB 447498 D01 General RF Exposure Guidance v06 and part 2.1093 Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition(s), listed below, is (are) satisfied. SAR Test Exclusion Thresholds for 100 MHz – 6 GHz and 50 mm Table. exclusion. (MHz) Peak Output Power (dBm) Peak Output Power (mW) 2403.65 -0.332 0.926 2441.65 -0.472 0.897 2479.65 -0.692 0.853 Remark: The best case gain of the antenna is 2.03dBi. 2.03dBi logarithmic terms convert to numeric result is nearly 1.60 The 1-g and 10-g 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)] · [√f(GHz)] Description of EUTPortable FCC ID :2A8BYRJ-758 Frequency (MHz) Range tune up max power (dBm) [(max. power of channel, including tune-up tolerance, mW) (min. test separation distance,mm)] [f(GHz)] Result Limit 2403.65 0~-2 0 1.000 5 2.40365 0.310 3 2441.65 0~-2 0 1.000 5 2.44165 0.313 3 2479.65 0~-2 0 1.000 5 2.47965 0.315 3 The test Result is less than 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. Conclusion: No SAR is required.  

Shenzhen HTT Technology Co., Ltd. Report No.: HTT202207306F01 This results shown in this test report refer only to the sample(s) tested, this test report cannot be reproduced, except in full, without prior written permission of the company. The report would be invalid without specific stamp of test institute and the signatures of compiler and approver. Page 1 of 32 TEST Report Applicant: Dongguan Ruijun Electronics Co.,Ltd Address of Applicant: No.6, 17th Alley, Wenming Road, Fourth Area of Nanzha, Humen Town, Dongguan City, Guangdong, China. Manufacturer : Dongguan Ruijun Electronics Co.,Ltd Address of Manufacturer : No.6, 17th Alley, Wenming Road, Fourth Area of Nanzha, Humen Town, Dongguan City, Guangdong, China. Equipment Under Test (EUT) Product Name: Wireless keyboard Model No.: RJ-758 Series model: N/A Trade Mark: , FCC ID: 2A8BYRJ-758 Applicable standards: FCC CFR Title 47 Part 15 Subpart C Section 15.247 Date of sample receipt: Jul. 21,2022 Date of Test: Jul. 21,2022- Aug. 04,2022 Date of report issued: Aug. 04,2022 Test Result : PASS * * In the configuration tested, the EUT complied with the standards specified above. Report No.: HTT202207306F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 2 of 32 1. Version Version No. Date Description 00 Aug. 04,2022 Original Tested/ Prepared By Date: Aug. 04,2022 Project Engineer Check By: Date: Aug. 04,2022 Reviewer Approved By : Date: Aug. 04,2022 Authorized Signature Report No.: HTT202207306F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 3 of 32 2. Contents Page 1. VERSION .................................................................................................................................................. 2 2. CONTENTS .............................................................................................................................................. 3 3. TEST SUMMARY ..................................................................................................................................... 4 4. GENERAL INFORMATION ...................................................................................................................... 5 4.1. GENERAL DESCRIPTION OF EUT ......................................................................................................... 5 4.2. TEST MODE ........................................................................................................................................ 7 4.3. DESCRIPTION OF SUPPORT UNITS ....................................................................................................... 7 4.4. DEVIATION FROM STANDARDS ............................................................................................................. 7 4.5. ABNORMALITIES FROM STANDARD CONDITIONS .................................................................................... 7 4.6. TEST FACILITY .................................................................................................................................... 7 4.7. TEST LOCATION .................................................................................................................................. 7 4.8. ADDITIONAL INSTRUCTIONS ................................................................................................................. 7 5. TEST INSTRUMENTS LIST ..................................................................................................................... 8 6. TEST RESULTS AND MEASUREMENT DATA ...................................................................................... 9 6.1. CONDUCTED EMISSIONS ..................................................................................................................... 9 6.2. CONDUCTED OUTPUT POWER ........................................................................................................... 10 6.3. CHANNEL BANDWIDTH ...................................................................................................................... 12 6.4. BAND EDGES .................................................................................................................................... 16 6.5.1 Conducted Emission Method ......................................................................................................... 16 6.5.2 Radiated Emission Method ............................................................................................................ 18 6.5. SPURIOUS EMISSION ......................................................................................................................... 22 6.6.1 Conducted Emission Method ......................................................................................................... 22 6.6.2 Radiated Emission Method ............................................................................................................ 24 7. ANTENNA REQUIREMENT ................................................................................................................... 32 8. EUT CONSTRUCTIONAL DETAILS ..................................................................................................... 32 Report No.: HTT202207306F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 4 of 32 3. Test Summary Test Item Section in CFR 47 Result Antenna requirement 15.203/15.247 (c) Pass AC Power Line Conducted Emission 15.207 N/A Conducted Output Power 15.247 (b)(3) Pass Channel Bandwid…

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Antenna Specification Specifications Summary ITEM SPEC. Model Name ISM 2.4 GHz Center Frequency 2403.65 MHz 2441.65 MHz 2.03dBi 1.58 dBi 0.49 dBi MAX. GAIN 2.03 dBi Polarization Horizontal Azimuth Beam Pattern Omni-directional Impedance 50 Ω Antenna Length Antenna Photo & Length 12.7MM 2479.65 MHz Approvalsheet Vertical Horizontal Y-Z Plane X-Z Plane X-Y Plane 4. Result Center Frequency Maximum Ant Gain H 2.03 dBi 2403.65 MHz V -9.24 dBi H 1.61 dBi 2441.65 MHz V -9.65 dBi H 0.49 dBi V -11.45 dBi 2479.65 MHz

Shenzhen HTT Technology Co., Ltd. Report No.: HTT202207306F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 1 of 1 Test Setup Photo Radiated Emission ------End------