XJ4KB6303BLUETOOTH KEYBOARD

Federal Communications Commission (FCC) 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 generate, 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. 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. 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. RF exposure warning This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. The equipment must not be co-located or operating in conjunction with any other antenna or transmitter.

External Photograph (1) EUT Photo (2) EUT Photo (3) EUT Photo (4) EUT Photo (5) EUT Photo (6) EUT Photo

MRT Technology (Suzhou) Co., Ltd Phone: +86-512-66308358 Fax: +86-512-66308368 www.mrt-cert.com 1 of 2 Internal Photograph (1) EUT Photo (2) EUT Photo 2 of 2 (3) EUT Photo (4) EUT Photo

MRT Technology (Suzhou) Co., Ltd Report No.: 1312RSU00606 Phone: +86-512-66308358 Fax: +86-512-66308368 Report Version: V01 www.mrt-cert.com FCC ID: XJ4KB6303 Page Number: 1 of 4 RF Exposure Evaluation Declaration FCC ID: XJ4KB6303 APPLICANT: HUIZHOU CHINFAI ELECTRONIC CO., LTD Application Type: Certification Product: Bluetooth Keyboard Model No.: KB-6303 FCC Classification: FCC Part 15 Spread Spectrum Transmitter(DSS) Test Date: December 20 ~ 25, 2013 Reviewed By : ( Engineer: Sunny Sun) Approved By : ( Manager: Robin Wu ) The test results relate only to the samples tested. The test results shown in the test report are traceable to the national/international standards through the calibration of the equipment and evaluated measurement uncertainty herein. The test report shall not be reproduced except in full without the written approval of MRT Technology (Suzhou) Co., Ltd. Report No.: 1312RSU00606 FCC ID: XJ4KB6303 Page Number: 2 of 4 Revision History Report No. Version Description Issue Date 1312RSU00606 Rev. 01 Initial report 2013-12-26 Report No.: 1312RSU00606 FCC ID: XJ4KB6303 Page Number: 3 of 4 1. RF Exposure Evaluation 1.1. Limits According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) radiation as specified in 1.1307(b) LIMITS FOR MAXIMUM PERMISSIBLE EXPOSURE (MPE) Frequency Range (MHz) Electric Field Strength (V/m) Magnetic Field Strength (A/m) Power Density (mW/cm 2 ) Average Time (Minutes) (A) Limits for Occupational/ Control Exposures 300-1500 -- -- f/300 6 1500-100,000 -- -- 5 6 (B) Limits for General Population/ Uncontrolled Exposures 300-1500 -- -- f/1500 6 1500-100,000 -- -- 1 30 f= Frequency in MHz Calculation Formula: P d = (P out *G)/(4*pi*r 2 ) Where P d = power density in mW/cm 2 P out = output power to antenna in mW G = gain of antenna in linear scale Pi = 3.1416 r = distance between observation point and center of the radiator in cm (The minimum distance is 20cm) P d is the limit of MPE, 1mW/cm². If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached. Report No.: 1312RSU00606 FCC ID: XJ4KB6303 Page Number: 4 of 4 1.2. Test Procedure Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. The temperature and related humidity: 18°C and 78% RH. 1.3. Test Result of RF Exposure Evaluation Product Bluetooth Keyboard Test Item RF Exposure Evaluation Antenna Gain: The maximum Gain measured in fully anechoic chamber is 2.0dBi for 2.4GHz in logarithm scale. Output Power into Antenna: Test Mode Frequency Band (MHz) Maximum output power to antenna (mW) Limit of Power Density S(mW/cm²) Bluetooth 2402~2480 1.749 1 Per FCC KDB 447498 D01v05r01, the SAR exclusion threshold for distances<50mm is defined by the following equation: Based on the maximum conducted power of Bluetooth and the antenna to use separation distance, Bluetooth SAR was not required; [(1.749mW/5)* √2.480] = 0.55 < 3.0. Note: When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. The End

MRT Technology (Suzhou) Co., Ltd Report No.: 1312RSU00605 Phone: +86-512-66308358 Fax: +86-512-66308368 Report Version: V02 www.mrt-cert.com FCC ID: XJ4KB6303 Page Number: 1 of 67 FCC ID: XJ4KB6303 APPLICANT: HUIZHOU CHINFAI ELECTRONIC CO., LTD Application Type: Certification Product: Bluetooth Keyboard Model No.: KB-6303 FCC Classification: FCC Part 15 Spread Spectrum Transmitter(DSS) FCC Rule Part(s): Part 15 Subpart C (15.247) Test Procedure(s): ANSI C63.10-2009, DA 00-705 Test Date: December 20 ~ 25, 2013 MEASUREMENT REPORT FCC PART 15.247 Bluetooth Reviewed By : ( Engineer: Sunny Sun) Approved By : ( Manager: Robin Wu ) The test results relate only to the samples tested. This equipment has been shown to be capable of compliance with the applicable technical standards as indicated in the measurement report and was tested in accordance with the measurement procedures specified in ANSI C63.10-2009 and DA 00-705. Test results reported herein relate only to the item(s) tested. The test report shall not be reproduced except in full without the written approval of MRT Technology (Suzhou) Co., Ltd. Report No.: 1312RSU00605 FCC ID: XJ4KB6303 Page Number: 2 of 67 CONTENTS Description Page Revision History............................................................................................................................. 5 §2.1033 General Information ....................................................................................................... 6 1. INTRODUCTION ..................................................................................................................... 7 1.1. Scope ........................................................................................................................... 7 1.2. MRT Test Location ....................................................................................................... 7 2. PRODUCT INFORMATION ..................................................................................................... 8 2.1. Equipment Description .................................................................................................. 8 2.2. Frequency / Channel Opreation .................................................................................... 9 2.3. Pseudorandom Frequency Hopping Sequence ........................................................... 10 2.4. Device Capabilities ..................................................................................................... 10 2.5. Test Configuration ...................................................................................................... 10 2.6. Test Software ............................................................................................................. 10 2.7. EMI Suppression Device(s)/Modifications .................................................................... 11 2.8. Labeling Requirements ................................................................................................ 11 3. DESCRIPTION OF TEST ...................................................................................................... 12 3.1. Evaluation Procedure ................................................................................................. 12 3.2. AC Line Conducted Emissions ................................................................................... 12 3.3. Radiated Emissions .................................................................................................... 13 4. ANTENNA REQUIREMENTS ................................................................................................ 14 5. TEST EQUIPMENT CALIBRATION DATA ............................................................................ 15 6. MEASUREMENT UNCERTAINTY ......................................................................................... 16 7. TEST RESULT ...................................................................................................................... 17 7.1. Summary .................................................................................................................... 17 7.2. 20dB Bandwidth Measurement ................................................................................... 19 7.2.1. Test Limit ................................................................................................................ 19 7.2.2. Test Procedure used ............................................................................................... 19 7.2.3. Test Setting ............................................................................................................. 19 7.2.4. Test Setup ............................................................................................................... 19 7.2.5. Test Result .............................................................................................................. 20 7.3. Output Power Measurement ....................................................................................... 23 7.3.1. Test Limit ................................................................................................................ 23 7.3.2. Test Procedure Used .............................................................................................. 23 Report No.: 1312RSU00605 FCC ID: XJ4KB6303 Page Number: 3 of 67 7.3.3. Test Setting ............................................................................................................. 23 7.3.4. Test Setup ............................................................................................................... 23 7.3.5. Test Result .............................................................................................................. 24 7.4. Carrier Frequency Separation Measurement .............................................................. 27 7.4.1. Test Limit ................................................................................................................…

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1 of 2 Test Setup Photo Description: Radiated Emission Test Setup for Below 30MHz Description: Radiated Emission Test Setup for Below 1GHz Description: Radiated Emission Test Setup for 1~18GHz Description: Radiated Emission Test Setup for Above 18GHz