PRDRX12Wireless Receiver

NKR570 QSG This guide outlines the operating procedures and safety precautions. Please read it carefully to make sure you are using your product properly and keep it for future reference. Specifications - Model: NKR570 - 96Keys Mechanical Keyboard - Backlight: Monochrome mixed color / Monochrome - Lithium battery: 3.7v 1000mA - Cable Length: 1800mm - Dimensions (L x W x H): Keyboard without palm rest: 386 x 137 x 39 mm - Weight: 680g ± 5g - System compatibility : Windows® 7/8/8.1/10/11 - Connector Type: USB - All Keys Anti-ghosting Keys Package Contents - Nitro Gaming Keyboard x 1 - purpose key puller x 1 - Quick Start Guide x 1 - Warranty booklet x 1 I. Mode Switching 1. Bluetooth Mode: Switch both positions to "ON" 1) Press and hold FN+Q to switch to BT1 Bluetooth Channel 1. The Q button will flash rapidly at 2.5Hz, stopping after successful pairing. 2) Press and hold FN+W to switch to BT2 Bluetooth Channel 2. The W button will flash rapidly at 2.5Hz, stopping after successful pairing. 3) Press and hold FN+E to switch to BT3 Bluetooth Channel 3. The E button will flash rapidly at 2.5Hz, stopping after successful pairing. 4) Short press FN+Q, W, or E to switch Bluetooth channels. The corresponding Bluetooth channel will attempt to reconnect, and the corresponding indicator light will flash slowly at 0.5Hz, stopping after successful reconnection. 2. 2.4G Mode: Switch the two-position switch to "ON". The tri-mode keyboard is pre-paired at the factory. Plug the 2.4G adapter into the device's USB 2.0 interface and briefly press FN+R to use. To re-pair: Press and hold FN+R to switch to 2.4G pairing mode. The R key will flash rapidly at 2.5Hz. Plug in the 2.4G adapter; the flashing will stop after successful pairing. (Requires pre-customized software and a 2.4G adapter.) 3. Wired Mode Connect the keyboard to your computer using the data cable. Briefly press FN+TAB to switch to wired mode. After the driver is automatically installed, the keyboard is ready to use. 4. Power Saving Instructions 1) Power Saving Design: In wireless mode, if no key is pressed for 2 minutes, the keyboard backlight will automatically turn off, and the keyboard will enter standby mode. After 30 minutes of inactivity, the keyboard will enter deep sleep mode, simultaneously disconnecting 2.4G or Bluetooth and turning off all LEDs. Press any key to exit sleep mode. 2) In USB wired mode, the keyboard never enters sleep mode. A constantly lit FN key indicates charging, and the backlight will change when fully charged. II. Lighting Adjustment This device supports multiple lighting effects. ＊ Fn + \| key: Switch main button area lighting effects. Multiple effects are included by default. ＊ Fn + ↓ / ↑ key: Adjust main button area lighting brightness. At its maximum, the light flashes 3 times. ＊ Fn + ← / → key: Adjust main button area lighting speed. At its maximum, the light flashes 3 times. ＊ Game lighting and custom lighting (the number may vary depending on the version; please refer to the actual product). FN + Right Shift + 1 = Custom Lighting 1 FN + N = Lighting Recording/Save III. Multimedia Knob Long press encoder button = Encoder Lighting Mode: Short press encoder button: Switch backlight mode; rotate clockwise to increase backlight brightness, rotate counter-clockwise to decrease backlight brightness. Long press encoder button = Encoder Volume Mode: Short press encoder button: Toggle mute; rotate clockwise to increase volume, rotate counter-clockwise to decrease volume. IV. Other Key Functions: FN+A = Switch to Windows system (Flash A key indicator) FN+S = Switch to macOS system (Flash S key indicator) FN+WIN = Lock/Unlock WIN key FN+C = Toggle side lighting effect FN+Space = Turn off backlight with one key FN+ESC = Press and hold for 3 seconds to restore factory settings Key combination Function Key combination Function FN+F1 my computer FN+\| Switch main key lighting effects FN+F2 Home FN+↓/↑ Adjust main key lighting brightness FN+F3 mail FN+←/→ Adjust main key lighting speed FN+F4 calculator FN+ritht shift+1 Custom lighting 1 FN+F5 Music Player FN+ritht shift+2 Custom lighting 2 FN+F6 Stop FN+N Record/Save lighting effects FN+F7 Previous song FN+A Switch to Windows system FN+F8 paused FN+S Switch to macOS system FN+F9 Next song FN+WIN Lock/Unlock Windows FN+F10 Mute FN+C Switch side lighting effects FN+F11 Volume Down FN+Space On/Off backlight FN+F12 Volume Up Federal Communication Commission Interference Statement 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 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. FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment. 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. Radiation Exposure Statem…

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Acrox Technologies Co., Ltd. Covered Equipment Certification Attestation Letter 5/25/2026 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: PRDRX12 Acrox Technologies 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. Acrox Technologies 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 a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Acrox Technologies Co., Ltd. (“the applicant”) certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Signed: Printed name: Gavin Hsieh Title: Product Manager Company Name: Acrox Technologies Co., Ltd. Date: 5/25/2026

Acrox Technologies Co., Ltd. * the applicant must designate a contact located in the United States for purposes of acting as the applicant’s agent for service of process, regardless of whether the applicant is a domestic or foreign entity. An applicant located in the United States may designate itself as the agent for service of process. U.S. Agent Designation for Service of Process - Certification Attestation Letter 5/25/2026 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: PRDRX12 FRN of applicant: 0018333633 Per section 2.911(d)(7) of the FCC rules, Acrox Technologies Co., Ltd. (“the applicant”) certifies that the equipment for which authorization is sought is designated to the following U.S. agent* for service of process: Company Name: Acer America Corporation FCC Registration Number (FRN): 0033486168 Physical U.S. Company Address: 1730 N. 1st St. Suite 400 San Jose, CA 95112 United States Contact Person: young kim Agent Email Address: [email protected] The above contact person accepts the obligation for service of process. The applicant 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. Applicant Signed: Agent Signed (if different from Applicant): Signed: Signed: Printed name: Gavin Hsieh Printed name: young kim Title: Product Manager Title: Director Company Name: Acrox Technologies Co., Ltd. Company Name: Acer America Corporation Date: 5/25/2026 Date: 5/25/2026

DATE : 5/25/2026 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 Authority to Act as Agent On our behalf, I appoint EST Technology Co., Ltd. Address:Chilingxiang, Qishantou, Santun, Houjie, Dongguan, Guangdong, China to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in the Federal Communications Commission’s regulations will have affixed to it a label identical to that submitted for approval with this application. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for certification, still resides with Acrox Technologies Co., Ltd. Address:4F., No.89, Minshan St., Neihu Dist., Taipei City 114, Taiwan <Signature> Name：Gavin Hsieh Title：Product Manager Applicant Company：Acrox Technologies Co., Ltd.

DATE : 5/25/2026 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Compliance Testing, LLC to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). Sincerely, <Signature> Name：Gavin Hsieh Title：Product Manager Company：Acrox Technologies Co., Ltd.

DATE : 5/25/2026 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: PRDRX12 Product Name: Wireless Receiver Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commissions rules, we hereby request that the following documents be held confidential:  Schematics  Block diagram  Operation description These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors. <Signature> Name：Gavin Hsieh Title：Product Manager Company：Acrox Technologies Co., Ltd.

External Photos M/N: SR02 External Photos M/N: SR02 External Photos M/N: SR02

FCC ID: PRDRX12 Model:SR02 FCC ID: PRDRX12 Model:SR02 W10.565 mm x H1.929 mm W9.085 mm x H2.272 mm W9.6 mm X H2.3 mm

Internal Photos M/N: SR02 Antenna Internal Photos M/N: SR02

Page 1 of 3 Report No. ESTE-R2604256 FCC RF EXPOSURE REPORT Acrox Technologies Co., Ltd. Wireless Receiver Model Number: SR02 FCC ID: PRDRX12 Applicant: Acrox Technologies Co., Ltd. Address: 4F., No.89, Minshan St., Neihu Dist., Taipei City 114, Taiwan Prepared By: EST Technology Co., Ltd. Chilingxiang, Qishantou, Santun, Houjie, Dongguan, Guangdong, China Tel: 86-769-83081888-808 Report Number: ESTE-R2604256 Date of Test: Mar. 07, 2026 to Apr. 21, 2026 Date of Report: Apr. 24, 2026 Page 2 of 3 Report No. ESTE-R2604256 1. Applicable Standards FCC Part 2(Section 2.1093) FCC KDB 447498 D04 Interim General RF Exposure Guidance v01 2. Exposure Evaluation of Portable or Mobile Devices Human exposure to RF emissions from portable devices (47 CFR §2.1093), as defined by the FCC, must be evaluated with respect to the FCC-adopted limits for SAR. Evaluation of mobile devices, as defined by the FCC, may also be performed with respect to SAR limits, but in such cases it is usually simpler and more cost-effective to evaluate compliance with respect to field strength or power density limits. For certain devices that are designed to be used in both mobile and portable configurations similar to those described in 47 CFR §2.1091(d)(4), such as certain desktop phones and wireless modem modules, compliance for mobile configurations is also satisfied when the same device is evaluated for SAR compliance in portable configurations. The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 300 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. Page 3 of 3 Report No. ESTE-R2604256 3. Evaluation Results For 2.4G SRD Field strength =66.99dBuV/m@3m P={ [10 (66.99/20) /10 6 *3] 2 /30 }*1000mW =0.002mW< 2.72mW Note: 1. Limited=3060*(0.5/20)^x, x=-log(60/(3060*√f)). 2. We choose f=2.48GHz (Highest frequency) to calculate MPE limit as higher frequency will have lower MPE limits. 3. SAR Test Exclusion Thresholds is 2.72mW for separation distance 5mm. Therefore, SAR test is not required. End of Test Report

Antennadescribe 1.Antennadescribe: AntennaplateMonoploeantenna SR02Makename/modelname Antennagain0dBi Frequencyrange Connectortype 2.402GHZ-2.480GHZ direct Locationof SHENZHENSHIXINZHONGXIN TECHNOLOGY.CO.,LTD mearement(companyname) 2.Externalviewdrawing: Pictureofantenna 3.AntennaRadiationPattern [email protected] TotalAverageGain:-0.475dbi Phi04590135180235270315 -0.1-0.3-0.8-0.5-0.2-0.6-0.8-0.5 Gain [email protected] TotalAverageGain:-0.275dbi Phi04590135180235270315 0-0.1-0.3-0.6-0.1-0.2-0.6-0.4 Gain [email protected] TotalAverageGain:-0.237dbi Phi04590135180235270315 0-0.1-0.2-0.50-0.3-0.6-0.2 Gain

Page 1 of 51 Report No.ESTE-R2604255 FCC PART 15C TEST REPORT FOR CERTIFICATION On Behalf of Acrox Technologies Co., Ltd. Wireless Receiver Model Number: SR02 FCC ID: PRDRX12 Applicant: Acrox Technologies Co., Ltd. Address: 4F., No.89, Minshan St., Neihu Dist., Taipei City 114, Taiwan Prepared By: EST Technology Co., Ltd. Chilingxiang, Qishantou, Santun, Houjie, Dongguan, Guangdong, China Tel: 86-769-83081888-808 Report Number: ESTE-R2604255 Date of Test: Mar. 07, 2026 to Apr. 21, 2026 Date of Report: Apr. 24, 2026 Page 2 of 51 Report No.ESTE-R2604255 TABLE OF CONTENTS Description Page TEST REPORT VERIFICATION .......................................................................................................... 3 1. GENERAL INFORMATION ................................................................................................................ 5 1.1. Description of Device (EUT) ......................................................................................................... 5 1.2. Antenna Information ...................................................................................................................... 5 1.3. Information of RF Cable ................................................................................................................ 5 2. SUMMARY OF TEST ........................................................................................................................ 6 2.1. Summary of test result .................................................................................................................. 6 2.2. Test Facilities .................................................................................................................................. 7 2.3. Measurement uncertainty ............................................................................................................. 8 2.4. Assistant equipment used for test ............................................................................................... 8 2.5. Block Diagram ................................................................................................................................ 8 2.6. Test Mode ....................................................................................................................................... 9 2.7. Power Setting of Test Software ................................................................................................... 9 2.8. Channel List .................................................................................................................................... 9 2.9. Test Equipment List ..................................................................................................................... 10 3. FIELD STRENGTH OF FUNDAMENTAL .......................................................................................... 12 3.1. Limit ................................................................................................................................................ 12 3.2. Test Setup ..................................................................................................................................... 12 3.3. Spectrum Analyzer Setting ......................................................................................................... 12 3.4. Test Procedure ............................................................................................................................. 13 3.5. Test Result .................................................................................................................................... 14 4. RADIATED SPURIOUS EMISSIONS AND BAND EDGE ................................................................... 21 4.1. Limit ................................................................................................................................................ 21 4.2. Test Setup ..................................................................................................................................... 23 4.3. Spectrum Analyzer Setting ......................................................................................................... 24 4.4. Test Procedure ............................................................................................................................. 25 4.5. Test Result .................................................................................................................................... 26 5. 20DB BANDWIDTH ....................................................................................................................... 38 5.1. Limit ................................................................................................................................................ 38 5.2. Test Setup ..................................................................................................................................... 38 5.3. Spectrum Analyzer Setting ......................................................................................................... 38 5.4. Test Procedure ............................................................................................................................. 38 5.5. Test Condition .............................................................................................................................. 38 5.6. Test Result .................................................................................................................................... 39 6. AC POWER LINE CONDUCTED EMISSIONS ................................................................................. 41 6.1. Limit ................................................................................................................................................ 41 6.2. Test Setup ..................................................................................................................................... 41 6.3. Spectrum A…

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Conducted Emissions Test Radiated Test (30-1000 MHz) Radiated Test (Above 1GHz)