WIZKR431TDIGITAL PROPORTIONAL RADIO CONTROL SYSTEM

The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.

Date: 8/26/2015 To: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD FCC ID: WIZKR431T To Whom It May Concern: We, Kyosho Corporation of America, are applying FCC DOC for product DIGITAL PROPORTIONAL RADIO CONTROL SYSTEM which model no. are KR-431T. the FCC DOC is doing at proper FCC authorized and recognized lab, and FCC DOC will be issued soon. If you have any question or concerns, pls. contact us. Sincerely, Signature: Name: Futoshi Ishihara Company Name: Kyosho Corporation of America

FCC ID: WIZKR431T

RF Exposure Evaluation Limits 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 ) Averaging time (minutes) (A) Limits for Occupational/Controlled Exposures 0.3–3.0 614 1.63 *(100) 6 3.0–30 1842/f 4.89/f *(900/f 2 ) 6 30–300 61.4 0.163 1.0 6 300–1500 f/300 6 1500–100,000 5 6 (B) Limits for General Population/Uncontrolled Exposure 0.3–1.34 614 1.63 *(100) 30 1.34–30 824/f 2.19/f *(180/f 2 ) 30 30–300 27.5 0.073 0.2 30 300–1500 f/1500 30 1500–100,000 1.0 30 f = frequency in MHz Friis transmission formula: Pd = (Pout*G)/(4*pi*r 2 ) Where Pd = power density in mW/cm 2 , Pout = 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 Pd id the limit of MPE, 1 mW/cm 2 . 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. Test Procedure Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. Test Result of RF Exposure Evaluation Channel Output power to antenna (mW) Power Density at R=20cm (mW/cm 2 ) Limit (mW/cm 2 ) Result Lowest (2405.5MHz) 8.770 0.0028 1.0 PASS Middle (2440.0 MHz) 17.783 0.0056 1.0 PASS Highest (2475.0MHz) 21.878 0.0069 1.0 PASS Remark: antenna gain=2.0 dBi

Global United Technology Services Co., Ltd. Report No.: GTSE15060104102 Authorized Signature: Robinson Lo Laboratory Manager This report details the results of the testing carried out on one sample. The results contained in this test report do not relate to other samples of the same product and does not permit the use of the GTS product certification mark. The manufacturer should ensure that all products in series production are in conformity with the product sample detailed in this report. This report may only be reproduced and distributed in full. If the product in this report is used in any configuration other than that detailed in the report, the manufacturer must ensure the new system complies with all relevant standards. Any mention of GTS or testing done by GTS in connection with, distribution or use of the product described in this report must be approved by GTS in writing. This document cannot be reproduced except in full, without prior written approval of the Company. Any unauthorized alteration, forgery or falsification of the content or appearance of this document is unlawful and offenders may be prosecuted to the fullest extent of the law. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested and such sample(s) are retained for 90 days only. FCC Report Applicant: Kyosho Corporation of America Address of Applicant: 20322 Valencia Circle, Lake Forest, California, United States Equipment Under Test (EUT) Product Name: DIGITAL PROPORTIONAL RADIO CONTROL SYSTEM Model No.: KR-431T FCC ID: WIZKR431T Applicable standards: FCC CFR Title 47 Part 15 Subpart C Section 15.247:2014 Date of sample receipt: June 24, 2015 Date of Test: June 24-29, 2015 Date of report issued: June 30, 2015 Test Result : PASS * * In the configuration tested, the EUT complied with the standards specified above. Report No.: GTSE15060104102 Global United Technology Services Co., Ltd. Project No.: GTSE150601041RF Room 301-309, 3th Floor, Block A, Huafeng Jinyuan Business Building, No. 300 Laodong Industrial Zone,Xixiang Road, Baoan District, Shenzhen 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 2 of 42 2 Version Version No. Date Description 00 June 30, 2015 Original Prepared By: Date: June 30, 2015 Project Engineer Check By: Date: June 30, 2015 Reviewer Report No.: GTSE15060104102 Global United Technology Services Co., Ltd. Project No.: GTSE150601041RF Room 301-309, 3th Floor, Block A, Huafeng Jinyuan Business Building, No. 300 Laodong Industrial Zone,Xixiang Road, Baoan District, Shenzhen 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 3 of 42 3 Contents Page 1 COVER PAGE ................................................................................................................................................ 1 2 VERSION ........................................................................................................................................................ 2 3 CONTENTS .................................................................................................................................................... 3 4 TEST SUMMARY ........................................................................................................................................... 4 5 GENERAL INFORMATION ............................................................................................................................ 5 5.1 CLIENT INFORMATION ............................................................................................................................... 5 5.2 GENERAL DESCRIPTION OF EUT ............................................................................................................... 5 5.3 TEST MODE .............................................................................................................................................. 8 5.4 TEST FACILITY .......................................................................................................................................... 8 5.5 TEST LOCATION ....................................................................................................................................... 8 5.6 OTHER INFORMATION REQUESTED BY THE CUSTOMER ............................................................................... 8 5.7 DESCRIPTION OF SUPPORT UNITS ............................................................................................................. 8 5.8 TEST INSTRUMENTS LIST ........................................................................................................................... 9 6 TEST RESULTS AND MEASUREMENT DATA .......................................................................................... 10 6.1 ANTENNA REQUIREMENT ......................................................................................................................... 10 6.2 CONDUCTED PEAK OUTPUT POWER ........................................................................................................ 11 6.3 20DB EMISSION BANDWIDTH .................................................................................................................. 13 6.4 CARRIER FREQUENCIES SEPARATION ...................................................................................................... 15 6.5 HOPPING CHANNEL NUMBER .................................................................................................................. 17 6.6 DWELL TIME ........................................................................................................................................... 18 6.7 PSEUDORANDOM FREQUENCY HOPPING SEQUENCE ................................................................................ 22 6.8 BAND EDGE ........................................................................................................................................... 23 6.8.1 Conducted Emission Method ........…

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Radiated Emission