RF Exposure

FCC ID: 2AMH2BH099A

RF Exposure Info

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FCCID_3886055

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                 RF Exposure evaluation


                 Product Description: MINI WIRELESS EARBUD
                 Model Number: BHO99A
                 FCC ID: 2AMH2BHO99A


                 According to 447498 D01 General RF Exposure Guidance v05 The 1—g and 10—9 SAR test
                 exclusion thresholds for 100 MHz to 6 GHz at test separation distances < 50 mm are
                 determined by: [{(max. power of channel, including tune—up tolerance, mW)/({min. test
                 separation distance, mm)] [Vf(GHz)] < 3.0 for 1—g SAR and < 7.5 for 10—g extremity SAR,
                 where
                   f(GHz) is the RF channel transmit frequency in GHz
                   Power and distance are rounded to the nearest mW and mm before calculation



                 According to the follow transmitter output power (Pt) formula:
                 Pt= (E x d) 2/ (30 x gt)
                 Pt=transmitter output power in watts
                 gt=numeric gain of the transmitting antenna (unitess)
                 E=electric field strength in V/m
                 d=measurement distance in meters (m)


                   According to the formula described above:
                   Emax=93.68dBuv/m=0.048V/m, d=3m, g:=1.63
                   P;= ( Ex d ) */ ( 30 x g, ) =(0.048x3)" / (30x1.63)=0.0004240W=0.42mW


                    The result is rounded to one decimal place for comparison

                    Worse case is as below: [2402MHz —0.42mW output power]

                    (0.42mW / Smm)*[v2.402(GHz)]                        =     018 <3.0 for 1 — g SAR
                    Then SAR evaluation is not required


                    NOTE: For the maximum power, you can refer FCC test report.




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Document Created: 2018-06-11 11:17:03
Document Modified: 2018-06-11 11:17:03

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