RF exposure

FCC ID: WUI-BT57143

RF Exposure Info

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FCCID_4454040

$Reference No.: WTD19S08058102W002 Page 3 of 8 1.1 Test Facility A. Accreditations for Conformity Assessment (International) Country/Region Scope Covered By Scope Note USA FCC ID \ SDoC(VOC/DOC) 1 Canada IC ID \ VOC 2 Japan MIC-T \ MIC-R - Europe EMCD \ RED - Taiwan NCC - ISO/IEC 17025 Hong Kong OFCA - Australia RCM - India WPC - Thailand NTC - Singapore IDA - Note: 1. FCC Designation No.: CN1201. Test Firm Registration No.: 523476. 2. ISED CAB identifier : CN0013. Test Firm Registration No.: 7760A. B.TCBs and Notify Bodies Recognized Testing Laboratory. Recognized Testing Laboratory of … Notify body number TUV Rheinland Intertek Optional. TUV SUD SGS Phoenix Testlab GmbH 0700 Element Materials Technology Warwick Ltd. 0891 Timco Engineering, Inc. 1177 Eurofins Product Service GmbH 0681 Waltek Services (Shenzhen) Co.,Ltd. http://www.waltek.com.cn$

Reference No.: WTD19S08058102W002 Page 4 of 8

2 Contents
Page
COVER PAGE ........................................................................................................................................... 1
1 LABORATORIES INTRODUCTION ................................................................................................................... 2
1.1 TEST FACILITY ................................................................................................................................................. 3
2 CONTENTS ............................................................................................................................................................ 4

3 REVISION HISTORY ............................................................................................................................................ 5
4 GENERAL INFORMATION .................................................................................................................................. 6
4.1 GENERAL DESCRIPTION OF E.U.T ................................................................................................................. 6
5 RF EXPOSURE ...................................................................................................................................................... 7
5.1 REQUIREMENTS............................................................................................................................................... 7
5.2 EVALUATION RESULT ...................................................................................................................................... 8

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Reference No.: WTD19S08058102W002 Page 5 of 8

3 Revision History
Date of
Date of Commen Approve
Test report No. Receipt Date of Test Purpose
Issue t d
sample

2019-08-31
WTD19S08058102W002 2019-08-30 to 2019-09-16 original - Valid
2019-09-11

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Reference No.: WTD19S08058102W002 Page 6 of 8

4 General Information
4.1 General Description of E.U.T
Product: Drive 360 Dash Cam

Model(s).: BT57143
Operation Frequency: 802.11b/g/n HT20: 2412MHz ~ 2462MHz
802.11n HT40: 2422MHz~2452MHz
Antenna installation: Integrated Antenna
Antenna Gain: 0dBi
Type of modulation: IEEE 802.11b (CCK/QPSK/BPSK,11Mbps max.)
IEEE 802.11g (BPSK/QPSK/16QAM/64QAM,54Mbps max.)
IEEE 802.11n (BPSK/QPSK/16QAM/64QAM,HT20:72Mbps max.,
HT40:150Mbps max.)

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Reference No.: WTD19S08058102W002 Page 7 of 8

5 RF Exposure
Test Requirement: FCC Part 1.1307
Test Method: FCC Part 2.1091

5.1 Requirements

Systems operating under the provisions of this section shall be operated in a manner that ensures that
the public is not exposed to radio frequency energy levels in excess limit for maximum permissible
exposure. In accordance with 47 CFR FCC Part 2 Subpart J, section 2.1091 this device has been
defined as a mobile device whereby a distance of 0.2 m normally can be maintained between the user
and the device.
(A) Limits for Occupational / Controlled Exposure
Magnetic Field Averaging Time
Frequency Range Electric Field Power Density (S) 2 2
Strength (H) 2 |E| ,|H| or S
(MHz) Strength (E) (V/m) (mW/ cm )
(A/m) (minutes)
0.3-3.0 614 1.63 (100)* 6
3.0-30 1842 / f 4.89 / f (900 / f)* 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
Magnetic Field Averaging Time
Frequency Range Electric Field Power Density (S) 2 2
Strength (H) 2 |E| ,|H| or S
(MHz) Strength (E) (V/m) (mW/ cm )
(A/m) (minutes)
0.3-1.34 614 1.63 (100)* 30
1.34-30 824/f 2.19/f (180/f)* 30
30-300 27.5 0.073 0.2 30
300-1500 F/1500 30
1500-100,000 1.0 30
Note: f = frequency in MHz ; *Plane-wave equivalent power density

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Reference No.: WTD19S08058102W002 Page 8 of 8

5.2 Evaluation Result

E (V/m) ＝
30 × P × G Power Density: Pd (W/m²) ＝
E2
d 377
E ＝ Electric field (V/m)
P ＝ RF output power (W)
G ＝ EUT Antenna numeric gain (numeric)
d ＝ Separation distance between radiator and human body (m)
The formula can be changed to

Pd ＝
30 × P × G
377 × d 2
From the EUT RF output power, the minimum mobile separation distance, d=0.2m, as well as the gain of
the used antenna, the RF power density can be obtained

Limit of Power
Antenna Gain Antenna Gain Max. Output Output Power Power Density
Density
(dBi) (numeric) Power (dBm) (mW/cm2)
(mW) (mW/cm2)

0 1.0 18.29 67.45 0.0134 1
Result: Compliance
No SAR measurement is required.

======End of Report======

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Document Created: 2019-09-23 07:53:05
Document Modified: 2019-09-23 07:53:05