PRDKB55Compact Wireless Keyboard

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 and sales market. 1) Model No.: 100122491 2) Model No.: HOBLU100122491 3) Model No.: HOPNK100122491 FCC ID: PRDKB55 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

DATE : 11/9/2022 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 : 11/9/2022 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: PRDKB55 Product Name: Compact Wireless 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.

Keyboard Antenna Specification 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 10.5 * 2.5mm, 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. Figure1 Keyboard Antenna size Figure2 Keyboard Antenna The antenna's S11 test data is shown in figure 3, covering the entire 2.4 G frequency band. Figure3 Keyboard Antenna S11 The gain simulation data of the antenna is shown in figure 4, with the maximum gain of 0.9dBi. Figure4 Keyboard antenna gain and 3D direction diagram (the Y-axis is the left and right direction of figure 1, and the X-axis is the upper and lower direction of figure 1)

External Photos M/N: 100122491 External Photos M/N: 100122491 External Photos M/N: 100122491

Label Location

Internal Photos M/N: 100122491 Internal Photos M/N: 100122491 Internal Photos M/N: 100122491

FCC ID: PRDKB55 EST Technology Co., Ltd Report No. ESTE-R2211007 Page 1 of 3 FCC RF EXPOSURE REPORT Acrox Technologies Co., Ltd. Compact Wireless Keyboard Model Number: 100122491 Additional Model: HOBLU100122491, HOPNK100122491 FCC ID: PRDKB55 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-R2211007 Date of Test: Sep. 27~Nov. 01, 2022 Date of Report: Nov. 02, 2022 FCC ID: PRDKB55 EST Technology Co., Ltd Report No. ESTE-R2211007 Page 2 of 3 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. FCC ID: PRDKB55 EST Technology Co., Ltd Report No. ESTE-R2211007 Page 3 of 3 3. Evaluation Results For 2.4G SRD Field strength = 76.66dBuV/m@3m P={ [10 (76.66 /20) /10 6 *3] 2 /30 }*1000mW = 0.014mW< 2.72mW Note: 1. Limited=3060*(0.5/20)^x, x=-log(60/(3060*√f)). 2. We choose f=2.48GHz (Highest frequency operate) 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

FCC ID: PRDKB55 EST Technology Co., Ltd Report No.ESTE-R2211006 Page 1 of 46 FCC PART 15C TEST REPORT FOR CERTIFICATION On Behalf of Acrox Technologies Co., Ltd. Compact Wireless Keyboard Model Number: 100122491 Additional Model: HOBLU100122491, HOPNK100122491 FCC ID: PRDKB55 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-R2211006 Date of Test: Sep. 27~Nov. 01, 2022 Date of Report: Nov. 02, 2022 FCC ID: PRDKB55 EST Technology Co., Ltd Report No.ESTE-R2211006 Page 2 of 46 TABLE OF CONTENTS Description Page TEST REPORT VERIFICATION......................................................................................................................... 3 1. GENERAL INFORMATION ................................................................................................................. 4 1.1. Description of Device (EUT) ........................................................................................................... 4 1.2. Antenna Information ........................................................................................................................ 4 1.3. Information of RF Cable .................................................................................................................. 4 2. SUMMARY OF TEST ......................................................................................................................... 5 2.1. Summary of test result ...................................................................................................................... 5 2.2. Test Facilities ................................................................................................................................... 6 2.3. Measurement uncertainty ................................................................................................................. 7 2.4. Assistant equipment used for test ..................................................................................................... 7 2.5. Block Diagram ................................................................................................................................. 7 2.6. Test Mode ......................................................................................................................................... 8 2.7. Power Setting of Test Software ........................................................................................................ 8 2.8. Channel List ..................................................................................................................................... 8 2.9. Test Equipment List ......................................................................................................................... 9 3. FIELD STRENGTH OF FUNDAMENTAL ............................................................................................ 10 3.1. Limit ............................................................................................................................................... 10 3.2. Test Setup ....................................................................................................................................... 10 3.3. Spectrum Analyzer Setting ............................................................................................................. 10 3.4. Test Procedure ................................................................................................................................ 11 3.5. Test Result ...................................................................................................................................... 12 4. RADIATED SPURIOUS EMISSIONS AND BAND EDGE ...................................................................... 19 4.1. Limit ............................................................................................................................................... 19 4.2. Test Setup ....................................................................................................................................... 21 4.3. Spectrum Analyzer Setting ............................................................................................................. 22 4.4. Test Procedure ................................................................................................................................ 23 4.5. Test Result ...................................................................................................................................... 24 5. 20DB BANDWIDTH ........................................................................................................................ 36 5.1. Limit ............................................................................................................................................... 36 5.2. Test Setup ....................................................................................................................................... 36 5.3. Spectrum Analyzer Setting ............................................................................................................. 36 5.4. Test Procedure ................................................................................................................................ 36 5.5. Test Condition ................................................................................................................................ 36 5.6. Test Result ...................................................................................................................................... 37 6. ANTENNA REQUIREMENTS ............................................................................................................ 39 6.1. Limit ...................................................................................…

Text truncated - open the document above for the full version.

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