PRDKB72WIRELESS SPLIT KEY ERGONOMIC KEYBOARD

Bluetooth Ergonomic Keyboard w/Nano Receiver USER'S GUIDE Ver.:1.00 CAUTION: To use this product properly, please read the user's guide before installation 1 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 Statement: The product comply with the FCC portable RF exposure limit set forth for an uncontrolled environment and are safe for intended operation as described in this manual. The further RF exposure reduction can be achieved if the product can be kept as far as possible from the user body or set the device to lower output power if such function is available. 2 Functional Introduction 3 1. Key Function (* compound key, Press with Fn key) Keys Mac Win Key Function Brightness- Brightness- Decrease display brightness Brightness+ Brightness+ Increase display brightness Previous Previous Switch to the previous media track Play / Pause Play / Pause Switch between playing and pausing media Next Next Switch to the next media track Mute Mute Mute (turns off) the computer's sound Volume down (Voice-) Volume down (Voice-) Decrease the computer's sound volume. Volume up (Voice+) Volume up (Voice+) Increase the computer's sound volume. / Homepage (www/e) Start the default Web browser and loads the home Web page / Outlook(E-mail) Default Start the default e-mail program / My Computer My Computer / Favorites Open My favorite after into Internet browser application 2 FN Lock 3 Switching Between Win / Mac Systems 4 / Calculator Calculator 5 Switch to USB nano receiver channel (2.4GHz ) Switch to Bluetooth channel 1 Switch to Bluetooth channel 2 6 LED Indicator 7 Wrist Rest 4 8 Power On/Off Switch 9 Folding Bracket 10 Battery & USB Receiver Storage Cover 11 Nano Receiver LED /Status Indicator LED LED1 Nums lock : White LED LED2 Cap lock : White LED LED3 Low battery Warning : Red LED 2.4G : Purple LED BT1 : Blue LED BT2 : Green LED Battery and Power Management: Step 1: Take the battery cover off. Step 2: Insert the battery as shown inside the battery compartment. AAA Battery X 2 5 Step 3: Replace the cover. Step 4: Turn on power switch **Warning: *Please insert the battery with the correct position according to the instruction labeled on the mouse & Keyboard. Switch Connection Channel Connect via USB nano receiver 2.4G Mode – Purple LED 1. Insert the battery into the keyboard, then follow the steps below. USB receiver Bluetooth 1 Bluetooth 2 6 2. In the meantime, to open the cover under the keyboard, take the nano receiver out. 3. Plug the Nano receiver into the USB A port on your computer. 4. Once press 2.4G button and switch to 2.4 G mode(Purple light flashes), plug the receiver then connect successfully. 5. If pairing is not successful, the LED blinks for 5 seconds and then turns off. Once pairing is successful, the LED turns off immediately. LED Indicator *2.4G Mode Purple LED Blinking Pairing(LED OFF when paired or failed after 10 Sec Red LED Blinking for 10 Sec Low battery Warning 7 6. Power On: When powered on without the receiver inserted, the LED will blink slowly for 5 seconds. When powered on with the receiver inserted, the LED will remain steadily lit for 2 seconds. Connect via Bluetooth in windows Bluetooth Mode Once press the BT1 / BT2 button and switch to bluetooth mode (Blue or Green light flashes), press the BT1/BT2 button for 3s, indication will flash rapidly. Paring name of ” ST63682-1 or ST63682-2” will appear in the bluetooth searching, press "pair" to connect. 1.On your PC, select Start > Settings > Bluetooth & devices > Turn on Bluetooth > Add device > Bluetooth. 2.Mouse switch to BT mode and press Connect Button. 3.Find ” ST63682-1 or ST63682-2” and press connect. Swift pair On your PC, select Start > Settings > Bluetooth & devices > View more devices > Turn on the Show notifications to connect using Swift Pair. 8 2. Mouse switch to BT mode and press Connect Button. 3. Windows will show a notification ” ST63682-1 or ST63682-2” and Selecting “Connect” starts pairing. Connect via Bluetooth in Mac 1.Click on “Apple menu” (top left corner of your screen). 2.Go to System Preferences-> Bluetooth-> Turn Bluetooth on to set up Bluetooth device and find ” ST63682-1 or ST63682-2” press connect. LED Indicator * Bluetooth 1 Mode Blue LED Blinking Pairing(LED OFF when paired or failed after 10 Sec Red LED Blinking for 10 Sec Low battery Warning * Bluetooth 2 Mode Green LED Blinking Pairing(LED OFF when paired or failed after 10 Sec Red LED Blinking for 10 Sec Low battery Warning 9 Reset USB…

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Acrox Technologies Co., Ltd. Covered Equipment Certification Attestation Letter 3/31/2026 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: PRDKB72 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: 3/31/2026

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 3/31/2026 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: PRDKB72 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: 1PerfectChoice, Inc. FCC Registration Number (FRN): 0033429309 Physical U.S. Company Address: 21908 Valley Blvd., Walnut, CA 91789 Contact Person: Choon Kek 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: Choon Kek Title: Product Manager Title: Chief Operating Officer Company Name: Acrox Technologies Co., Ltd. Company Name: 1PerfectChoice, Inc. Date: 3/31/2026 Date: 3/31/2026

DATE : 3/31/2026 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 : 3/31/2026 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 : 3/31/2026 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: PRDKB72 Product Name: WIRELESS SPLIT KEY ERGONOMIC KEYBOARD 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.

Acrox Technologies Co., Ltd. I, the undersigned, Gavin Hsieh: The following models have the same technical construction including circuit diagram, PCB Layout, components and component layout, all electrical construction and mechanical construction, except the different model number. 1) Model No.: ST63682 2) Model No.: KVC FCC ID: PRDKB72 Sincerely, Client’s signature : Client’s name / title : Gavin Hsieh / Product Manager Contact information / address : 4F., No.89, Minshan St., Neihu Dist., Taipei City 114, Taiwan Telephone: 886-2-2796-5888 Fax No.: 886-2-2793-8999

External Photos M/N: ST63682 External Photos M/N: ST63682 External Photos M/N: ST63682

96.5mm 38.5mm WIRELESS SPLIT KEY ERGONOMIC KEYBOARD Model: ST63682 Input: 3V 50mA FCC ID: PRDKB72 S/N: YYMM000001 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. Do not mix old and new batteries. Do not mix alkaline, standard (Carbon-Zinc), or rechargeable (Nickel Cadmium) batteries. Made in China

Label Location

Internal Photos M/N: ST63682 Internal Photos M/N: ST63682 Internal Photos M/N: ST63682 PCB Antenna

Page 1 of 3 Report No. ESTE-R2603273 FCC RF EXPOSURE REPORT Acrox Technologies Co., Ltd. WIRELESS SPLIT KEY ERGONOMIC KEYBOARD Model Number: ST63682 Additional Model: KVC FCC ID: PRDKB72 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-R2603273 Date of Test: Feb. 05, 2026 to Mar. 05, 2026 Date of Report: Mar. 19, 2026 Page 2 of 3 Report No. ESTE-R2603273 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-R2603273 3. Evaluation Results Mode CH Peak Output Power （dBm） Antenna Gain (dBi) Effective Radiated Power （dBm） Target Power (dBm) Max. Target Power (mW) SAR Test Exemption Limit (mW) BLE 1M 2402 1.36 3.22 2.43 2±1 1.995 2.72 2440 0.60 3.22 1.67 1±1 1.585 2.72 2480 0.56 3.22 1.63 1±1 1.585 2.72 For 2.4G SRD Field strength =73.45dBuV/m@3m P={ [10 (73.45/20) /10 6 *3] 2 /30 }*1000mW =0.0066mW< 2.72mW Note: 1. Limited=3060*(0.5/20)^x, x=-log(60/(3060*√f)). 2. We choose f=2.48GHz (Highest frequency operate at bluetooth) 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

Page 1 of 18 Report No.ESTE-R2603271 Appendix A: DTS Bandwidth Test Result Test Mode Antenna Frequency[MHz] DTS BW [MHz] FL[MHz] FH[MHz] Limit[MHz] Verdict BLE_1M Ant1 2402 0.627 2401.685 2402.312 0.5 PASS BLE_1M Ant1 2440 0.615 2439.694 2440.309 0.5 PASS BLE_1M Ant1 2480 0.597 2479.697 2480.294 0.5 PASS Page 2 of 18 Report No.ESTE-R2603271 Test Graphs BLE_1M-Ant1-2402-PASS BLE_1M-Ant1-2440-PASS BLE_1M-Ant1-2480-PASS Page 3 of 18 Report No.ESTE-R2603271 Page 4 of 18 Report No.ESTE-R2603271 Appendix B: Maximum conducted output power Test Result Peak Test Mode Antenna Frequency[MHz] Conducted Peak Power[dBm] Conducted Limit[dBm] Verdict BLE_1M Ant1 2402 1.36 ≤30 PASS BLE_1M Ant1 2440 0.60 ≤30 PASS BLE_1M Ant1 2480 0.56 ≤30 PASS Test Graphs Peak BLE_1M-Ant1-2402-PASS BLE_1M-Ant1-2440-PASS Page 5 of 18 Report No.ESTE-R2603271 BLE_1M-Ant1-2480-PASS Page 6 of 18 Report No.ESTE-R2603271 Appendix C: Maximum power spectral density Test Result TestMode Antenna Frequency[MHz] Result[dBm/3kHz] Limit[dBm/3kHz] Verdict BLE_1M Ant1 2402 -12.97 ≤8.00 PASS BLE_1M Ant1 2440 -13.65 ≤8.00 PASS BLE_1M Ant1 2480 -12.54 ≤8.00 PASS Page 7 of 18 Report No.ESTE-R2603271 Test Graphs BLE_1M-Ant1-2402-PASS BLE_1M-Ant1-2440-PASS BLE_1M-Ant1-2480-PASS Page 8 of 18 Report No.ESTE-R2603271 Page 9 of 18 Report No.ESTE-R2603271 Appendix D: Reference level measurement Test Result TestMode Antenna Freq(MHz) Max.Point[MHz] Result[dBm] BLE_1M Ant1 2402 2401.98 0.34 BLE_1M Ant1 2440 2439.98 -0.48 BLE_1M Ant1 2480 2479.99 -0.48 Page 10 of 18 Report No.ESTE-R2603271 Test Graphs BLE_1M-Ant1-2402-PASS BLE_1M-Ant1-2440-PASS BLE_1M-Ant1-2480-PASS Page 11 of 18 Report No.ESTE-R2603271 Page 12 of 18 Report No.ESTE-R2603271 Appendix E: Band edge measurements Test Result TestMode Antenna ChName Frequency [MHz] RefLevel[dBm] Result[dBm] Limit[dBm] Verdict BLE_1M Ant1 Low 2402 0.34 -39.43 ≤-19.66 PASS BLE_1M Ant1 High 2480 -0.48 -39.33 ≤-20.48 PASS Page 13 of 18 Report No.ESTE-R2603271 Test Graphs BLE_1M-Ant1-2402-PASS BLE_1M-Ant1-2480-PASS Page 14 of 18 Report No.ESTE-R2603271 Appendix F: Conducted Spurious Emission Test Result TestMode Antenna Frequency[MHz] FreqRange [MHz] RefLevel [dBm] Result[dBm] Limit[dBm] Verdict BLE_1M Ant1 2402 30~26500 0.34 -41.68 ≤-19.66 PASS BLE_1M Ant1 2440 30~26500 -0.48 -41.34 ≤-20.48 PASS BLE_1M Ant1 2480 30~26500 -0.48 -40.96 ≤-20.48 PASS Page 15 of 18 Report No.ESTE-R2603271 Test Graphs BLE_1M-Ant1-2402-30~26500-PASS BLE_1M-Ant1-2440-30~26500-PASS BLE_1M-Ant1-2480-30~26500-PASS Page 16 of 18 Report No.ESTE-R2603271 Page 17 of 18 Report No.ESTE-R2603271 Appendix G: Duty Cycle Test Result TestMode Antenna Frequency[MHz] ON Time [ms] Period [ms] Duty Cycle [%] Duty Cycle Factor[dB] BLE_1M Ant1 2440 20.00 20.00 100 0.00 Page 18 of 18 Report No.ESTE-R2603271 Test Graphs NTNV-BLE_1M-Ant1-2440

Page 1 of 40 Report No.ESTE-R2603271 FCC PART 15C TEST REPORT FOR CERTIFICATION On Behalf of Acrox Technologies Co., Ltd. WIRELESS SPLIT KEY ERGONOMIC KEYBOARD Model Number: ST63682 Additional Model: KVC FCC ID: PRDKB72 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-R2603271 Date of Test: Feb. 05, 2026 to Mar. 05, 2026 Date of Report: Mar. 19, 2026 Page 2 of 40 Report No.ESTE-R2603271 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. Duty Cycle .......................................................................................................................................... 9 2.9. Channel List ..................................................................................................................................... 10 2.10. Test Equipment List ...................................................................................................................... 11 3. 6DB BANDWIDTH ............................................................................................................................ 12 3.1. Limit ................................................................................................................................................... 12 3.2. Test Setup ........................................................................................................................................ 12 3.3. Spectrum Analyzer Setting ............................................................................................................ 12 3.4. Test Procedure ................................................................................................................................ 12 3.5. Test Result ....................................................................................................................................... 12 4. MAXIMUM PEAK OUTPUT POWER .................................................................................................. 13 4.1. Limit ................................................................................................................................................... 13 4.2. Test Setup ........................................................................................................................................ 13 4.3. Spectrum Analyzer Setting ............................................................................................................ 13 4.4. Test Procedure ................................................................................................................................ 13 4.5. Test Result ....................................................................................................................................... 13 5. POWER SPECTRAL DENSITY .......................................................................................................... 14 5.1. Limit ................................................................................................................................................... 14 5.2. Test Setup ........................................................................................................................................ 14 5.3. Spectrum Analyzer Setting ............................................................................................................ 14 5.4. Test Procedure ................................................................................................................................ 14 5.5. Test Result ....................................................................................................................................... 14 6. CONDUCTED BAND EDGE .............................................................................................................. 15 6.1. Limit ........................................................................................................................................…

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Keyboard Antenna Specification Antenna overview 1. Antenna Type and Model: Type: PCB Antenna Model: PIFA Antenna 2．Gain: about 3.22dBi(Peak) 3. Antenna Directivity Coefficient: about 1.8 @2450MHz 4. Antenna Polarization characteristic: elliptical polarization 5. Inside or outside: Inside 6. Name of Manufacturer: Shenzhen Bailihe Technology Co., LTD(深圳市百里和科技有 限公司) 7. Name of Laboratory: Shenzhen Bailihe Technology Co., LTD(深圳市百里和科技有限 公司) Keyboard PIFA Antenna 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 Keyboard Module PCB antenna is 12.0 * 3.0mm, and the thickness of PCB is 1.6mm.The specific size of the antenna is shown in figure 1, the physical object is shown in figure 2. Figure 1 :Keyboard Antenna size Figure 2 : Keyboard Antenna The antenna's S11 test data is shown in figure 3, covering the entire 2.4 G frequency band. Figure 3 : Keyboard Antenna S11 Channel List-2.4G(MHz) 2402 2404 2406 2408 2410 2412 2414 2416 2418 2420 2422 2424 2426 2428 2430 2432 2434 2436 2438 2440 2442 2444 2446 2448 2450 2452 2454 2456 2458 2460 2462 2464 2466 2468 2470 2472 2474 2476 2478 2480 The gain simulation data of the antenna is shown in figure. Radiation Pattern PHI=0 PHI=90 Frequency Gain (dBi) Efficiency (%) 2400MHz 2.89 52 2410MHz 2.83 52 2420MHz 2.90 52 2430MHz 3.17 52 2440MHz 3.12 51 2450MHz 3.22 51 2460MHz 3.06 51 2470MHz 2.94 51 2480MHz 3.11 51 2490MHz 3.16 51 2500MHz 2.85 50 THETA=90 ANNEX B RADIATION PATTERN B.1 3D Pattern B1.1 3D Pattern for 2400MHz B1.2 3D Pattern for 2450MHz B1.3 3D Pattern for 2500MHz

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