MPE

FCC ID: ZZH-WF15S

RF Exposure Info

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FCCID_3905708

CERPASS TECHNOLOGY CORP. Report No.: DEFI1805111 FCC RF EXPOSURE REPORT EUT On/Off Switch WLAN: 2.412GHz ~ 2.462GHz WLAN: 2.422GHz ~ 2.452GHz WLAN: 5.180GHz ~ 5.240GHz Frequency band WLAN: 5.260GHz ~ 5.320GHz (Operating) WLAN: 5.500GHz ~ 5.700GHz BLE: 2.402GHz ~ 2.480GHz Bluetooth: 2.402GHz ~ 2.480GHz Portable (<20cm separation) Device category Mobile (>20cm separation) Occupational/Controlled exposure (S = 5mW/cm2) Exposure classification General Population/Uncontrolled exposure (S=1mW/cm2) Single antenna Multiple antennas Antenna diversity Tx diversity Rx diversity Tx/Rx diversity Max. output power 25.74dBm (374.973mW) Antenna gain (Max) 2.0dBi(Numeric gain:1.58) MPE Evaluation* Evaluation applied SAR Evaluation N/A Cerpass Technology Corp. Issued date : Jun. 12, 2018 Page No. : 1 of 3

CERPASS TECHNOLOGY CORP. Report No.: DEFI1805111 TEST RESULTS No non-compliance noted. Calculation 30  P  G E2 Given E & S d 3770 Where E = Field strength in Volts / meter P = Power in Watts G = Numeric antenna gain d = Distance in meters S = Power density in milliwatts / square centimeter Combining equations and re-arranging the terms to express the distance as a function of the remaining variables yields: 30  P  G S 3770d 2 Changing to units of mW and cm, using: P (mW) = P (W) / 1000 and d (cm) = d(m) /100 Yields 30  P / 1000  G PG S  0.0796  2 Equation 1 3770  d / 100 2 d Where d = Distance in cm P = Power in mW G = Numeric antenna gain S = Power density in mW / cm2 Cerpass Technology Corp. Issued date : Jun. 12, 2018 Page No. : 2 of 3

CERPASS TECHNOLOGY CORP. Report No.: DEFI1805111 Maximum Permissible Exposure Antenna Frequency Peak output Peak output Antenna gain Distance Power density Limit Modulation Mode band (MHz) power(dBm) power(mW) Gain (dBi) (Numeric ) (cm) (mW/cm2) (mW/cm2) 802.11b 2412-2462 22.13 163.3051948 2 1.58 20 0.05150544 1 802.11g 2412-2462 25.74 374.9730022 2 1.58 20 0.11826414 1 802.11n HT20 2412-2462 25.60 363.0780548 2 1.58 20 0.11451255 1 Cerpass Technology Corp. Issued date : Jun. 12, 2018 Page No. : 3 of 3


Document Created: 2018-06-27 15:03:02
Document Modified: 2018-06-27 15:03:02
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