RF Exposure report

FCC ID: H5OTR75

RF Exposure Info

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FCCID_4459494

Date of Issue: Sep. 23, 2019 WH Technology Corp. Report No.: WH-FCC-R19071901-1 Radio Frequency Exposure EUT INFORMATION FCC ID H5OTR75 EUT Car alarm 2 way main unit Frequency band 908.3 MHz ~ 923.783 MHz (Operating) Max. output power 17.29 dBm Antenna gain (Max) 3.1 dBi According to KDB 447498 D01 and FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency Radiation as specified in § 1.1307(b). Limits for Maximum Permissible Exposure (MPE) Frequency Electric Field Magnetic Field Power Average Time Range(MHz) Strength(V/m) Strength(A/m) Density(mW/cm2) (A) Limits for Occupational/Control Exposures 300-1500 -- -- F/300 6 1500-100000 -- -- 5 6 (B) Limits for General Population/Uncontrol Exposures 300-1500 -- -- F/1500 6 1500-100000 -- -- 1 30 TEST RESULT The modular use shall be at least 20cm distance away from human body. MPE Calculation Method Power Density = Pd (mW/cm2) = E2 / 3770 Combine these two formulas can be changed to Pd = (30*P*G) / (3770*d2) Page No. : 1 of 2

Date of Issue: Sep. 23, 2019 WH Technology Corp. Report No.: WH-FCC-R19071901-1 Note: 1. “E” means Electric field (V/m). 2. “P” means Peak RF output power (W). 3. “G” means EUT Antenna numeric gain (numeric). 4. “d” means the minimum mobile separation distance is 0.2m between radiator and human body. G=10( 3.1 / 10 ) = 2.041 Output Power Limit of Power Frequency Tune-up power Power Density Channel to Antenna Density (MHz) (dBm) (mW/cm2) (dBm) (mW/cm2) 1 908.3 17.29 18±1 0.0323 0.605 13 915.444 16.69 17±1 0.0256 0.61 25 923.783 14.72 15±1 0.0162 0.615 Tested By: Reviewed by: Sep. 23, 2019 Sep. 23, 2019 (Date) Bing / Engineer (Date) Bell / Manager FCC Designation Number: TW2954 Page No. : 2 of 2


Document Created: 2019-09-26 22:16:33
Document Modified: 2019-09-26 22:16:33
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