2AMBW-A139Car Dash Camera

Shenzhen Viofo Technology Co., Ltd Model Difference Product Name: Car Dash Camera Model Number(s): A139, A139 3CH, A139 2CH, A139 Pro Trademark: VIOFO FCC ID: 2AMBW-A139 All the model are the same circuit and RF module, except model names. Regards Sincerely Client’s signature: Client’s name / title : Bill Zhou / Business manager Contact information / address: Room201, Second Floor, Factory Building NO.1, Guanghui Science and Technology Park, Minqing Rd, Longhua Street, Longhua District, Shenzhen, China.

Shenzhen Viofo Technology Co., Ltd Agent Authorization Company: Shenzhen Viofo Technology Co., Ltd Address: Room201, Second Floor, Factory Building NO.1, Guanghui Science and Technology Park, Minqing Rd, Longhua Street, Longhua District, Shenzhen, China. Product Name: Car Dash Camera Model Number(s): A139, A139 3CH, A139 2CH, A139 Pro Trademark: VIOFO We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: 2021/2/1 Name: Bill Zhou Title: Business manager Company: Shenzhen Viofo Technology Co., Ltd

Shenzhen Viofo Technology Co., Ltd Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2021/2/1 Subject; Request for Confidentiality FCC ID: 2AMBW-A139 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Operational Description SOFTWARE SECURITY REQUIREMENTS FOR U-NII DEVICES In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuantto KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Bill Zhou Title: Business manager

External Photos

20*10mm FCC ID: 2AMBW-A139 Label Location

Internal Photos Antenna

FCC §15.247 (i), §2.1091 – RF Exposure FCC ID: 2AMBW-A139 Applied procedures / limit According to FCC §15.247(i) and §1.1307(b)(1), 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 level in excess of the Commission’s guidelines. Limits for Occupational / Controlled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/ cm 2 ) Averaging Time |E| 2 ,|H| 2 or S (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 Note: ƒ is frequency in MHz * = Power density limit is applicable at frequencies greater than 100 MHz Limits for General Population / Uncontrolled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/ cm 2 ) Averaging Time |E| 2 ,|H| 2 or S (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 MPE PREDICTION Predication of MPE limit at a given distance, Equation from OET Bulletin 65, Edition 97-01 Where: S = power density P = power input to antenna G = power gain of the antenna in the direction of interest relative to an isotropic radiator R = distance to the center of radiation of the antenna, R=0.2m TEST RESULTS For the Max simultaneous transmission MPE Tune up Produce power Maximu m peak output power (dBm) Output power to antenna (mW) Antenna Gain (numeric) Power Density (S) (mW/ cm2) Limit (mW/ cm2) Result BT 1±1 2 1.58 1.26 (1dBi) 0.0004 1 Pass 802.11 b/g/n 18±1 19 79.43 1.26 (1dBi) 0.01991 1 Pass 802.11 U- NII-1 11±1 12 15.85 1.26 (1dBi) 0.00397 1 Pass 802.11 U- NII-3 11±1 12 15.85 1.26 (1dBi) 0.00397 1 Pass Evaluation mode Power Density/Limit Sum of the MPE rate Limit Result BT 0.0004 0.02031 1 Pass 802.11 b/g/n 0.01991 Evaluation mode Power Density/Limit Sum of the MPE rate Limit Result BT 0.0004 0.00437 1 Pass 802.11 U- NII-1 0.00397

No.：BCTC/RF-EMC-005 Page: 1 of 60 Edition：A.3 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2011000679-2E Applicant: Shenzhen Viofo Technology Co., Ltd Product Name: Car Dash Camera Model/Type Ref.: A139 Tested Date: 2020-12-5 to 2020-12-29 Issued Date: 2020-12-30 Report No.: BCTC2011000679-2E No.：BCTC/RF-EMC-005 Page: 2 of 60 Edition：A.3 FCC ID: 2AMBW-A139 The test report is effective only with both signature and specialized stamp.This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen BCTC Testing Co., Ltd, this report can’t be reproduced except in full.The tested sample(s) and the sample information are provided by the client. Product Name: Car Dash Camera Trademark: VIOFO Model/Type Ref.: A139 A139 3CH, A139 2CH, A139 Pro Prepared For: Shenzhen Viofo Technology Co., Ltd Address: Room201, Second Floor, Factory Building NO.1, Guanghui Science and Technology Park, Minqing Rd, Longhua Street, Longhua District, Shenzhen, China. Manufacturer: Shenzhen Viofo Technology Co., Ltd Address: Room201, Second Floor, Factory Building NO.1, Guanghui Science and Technology Park, Minqing Rd, Longhua Street, Longhua District, Shenzhen, China. Prepared By: Shenzhen BCTC Testing Co., Ltd. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Tangwei, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: 2020-12-5 Sample tested Date: 2020-12-5 to 2020-12-29 Issue Date: 2020-12-30 Report No.: BCTC2011000679-2E Test Standards FCC Part15.247 ANSI C63.10-2013 Test Results PASS Remark: This is WIFI-2.4GHz band radio test report. Tested by: Approved by: Eric Yang/Project Handler Zero Zhou/Reviewer Report No.: BCTC2011000679-2E No.：BCTC/RF-EMC-005 Page: 3 of 60 Edition：A.3 TABLE OF CONTENT Test Report Declaration Page 1. VERSION ............................................................. 5 2. TEST SUMMARY ...................................................... 6 3. MEASUREMENT UNCERTAINTY ........................................ 7 4. PRODUCT INFORMATION AND TEST SETUP ............................ 8 4.1 Product Information ..................................................... 8 4.2 Test Setup Configuration ................................................ 8 4.3 Support Equipment ..................................................... 9 4.4 Channel List ........................................................... 9 4.5 Test Mode ............................................................ 10 5. TEST FACILITY AND TEST INSTRUMENT USED ........................ 11 5.1 Test Facility ........................................................... 11 5.2 Test Instrument Used .................................................. 11 6. CONDUCTED EMISSIONS ............................................. 13 6.1 Block Diagram Of Test Setup ............................................ 13 6.2 Limit ................................................................. 13 6.3 Test procedure ........................................................ 13 6.4 EUT operating Conditions ............................................... 14 6.5 Test Result ........................................................... 14 7. RADIATED EMISSIONS ............................................... 15 7.1 Block Diagram Of Test Setup ............................................ 15 7.2 Limit ................................................................. 16 7.3 Test procedure ........................................................ 17 7.4 EUT operating Conditions ............................................... 18 7.5 Test Result ........................................................... 19 8. RADIATED BAND EMISSION MEASUREMENT AND RESTRICTED BANDS OF OPERATION ................................................... 25 8.1 Block Diagram Of Test Setup ............................................ 25 8.2 Limit ................................................................. 25 8.3 Test procedure ........................................................ 26 8.4 EUT operating Conditions ............................................... 27 8.5 Test Result ........................................................... 28 9. POWER SPECTRAL DENSITY TEST ................................... 30 9.1 Block Diagram Of Test Setup ............................................ 30 9.2 Limit ................................................................. 30 9.3 Test procedure ........................................................ 30 9.4 EUT operating Conditions ............................................... 30 9.5 Test Result ........................................................... 31 10. BANDWIDTH TEST ................................................... 37 10.1 Block Diagram Of Test Setup .......................................... 37 Report No.: BCTC2011000679-2E No.：BCTC/RF-EMC-005 Page: 4 of 60 Edition：A.3 10.2 Limit ................................................................ 37 10.3 Test procedure ....................................................... 37 10.4 EUT operating Conditions ............................................. 37 10.5 Test Result .......................................................... 38 11. PEAK OUTPUT POWER TEST ......................................... 44 11.1 Block Diagram Of Test Setup .......................................... 44 11.2 Limit ................................................................ 44 11.3 Test procedure ....................................................... 44 11.4 EUT operating Conditions ............................................. 44 11.5 Test Result .......................................................... 45 12. 100 KHZ BANDWIDTH OF FREQUENCY BAND EDGE ................... 46 12.1 Block Diagram Of Test Setup .......................................... 46 12.2 Limit ................................................................ 46 12.3 Test procedure .....................................................…

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Report No.: BCTC2011000679-2E No.：BCTC/RF-EMC-005 Page: 47 of 60 Edition：A.3 12.5 Test Result Temperature： 26°C Relative Humidity： 54% Pressure： 101kPa Test Voltage ： DC 12V 802.11b: Band Edge, Left Side 802.11b: Band Edge, Right Side Report No.: BCTC2011000679-2E No.：BCTC/RF-EMC-005 Page: 48 of 60 Edition：A.3 802.11g: Band Edge, Left Side 802.11g: Band Edge, Right Side Report No.: BCTC2011000679-2E No.：BCTC/RF-EMC-005 Page: 49 of 60 Edition：A.3 802.11n-HT20: Band Edge, Left Side 802.11n-HT20: Band Edge, Right Side Report No.: BCTC2011000679-2E No.：BCTC/RF-EMC-005 Page: 50 of 60 Edition：A.3 CONDUCTED EMISSION MEASUREMENT 802.11b Low Channel 2412MHz Middle Channel 2437MHz High Channel 2462MHz Report No.: BCTC2011000679-2E No.：BCTC/RF-EMC-005 Page: 51 of 60 Edition：A.3 802.11g Low Channel 2412MHz Middle Channel 2437MHz High Channel 2462MHz Report No.: BCTC2011000679-2E No.：BCTC/RF-EMC-005 Page: 52 of 60 Edition：A.3 802.11n20 Low Channel 2412MHz Middle Channel 2437MHz High Channel 2462MHz Report No.: BCTC2011000679-2E No.：BCTC/RF-EMC-005 Page: 53 of 60 Edition：A.3 13. DUTY CYCLE OF TEST SIGNAL 13.1 Standard requirement Pre-analysis Check: While conducting average power measurement, duty cycle of each mode shall be checked to ensure its duty cycle in order to compensate for the loss due to insufficient ratio of duty cycle. All duty cycle is pre-scanned, and result as obtained below shows only the most representative ones where duty cycle is conducted as the given transmission with given virtual operation that expresses the percentage. 13.2 Formula Duty Cycle = Ton / (Ton+Toff) 13.3 Test procedure 1.Set span = Zero 2. RBW = 8MHz 3. VBW = 8MHz, 4. Detector = Peak 13.4 Test Result Duty Cycle Duty Fator (dB) 802.11b 1 0 802.11g 1 0 802.11n(HT20) 1 0 Report No.: BCTC2011000679-2E No.：BCTC/RF-EMC-005 Page: 54 of 60 Edition：A.3 802.11b 802.11g Report No.: BCTC2011000679-2E No.：BCTC/RF-EMC-005 Page: 55 of 60 Edition：A.3 802.11n(HT20) Report No.: BCTC2011000679-2E No.：BCTC/RF-EMC-005 Page: 56 of 60 Edition：A.3 14. ANTENNA REQUIREMENT 14.1 Limit 15.203 requirement: For intentional device, according to 15.203: an intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device. 14.2 Test Result The EUT antenna is FPC antenna, Antenna Gain is 1dBi, fulfill the requirement of this section. Report No.: BCTC2011000679-2E No.：BCTC/RF-EMC-005 Page: 57 of 60 Edition：A.3 15. EUT PHOTOGRAPHS EUT Photo 1 EUT Photo 2 Report No.: BCTC2011000679-2E No.：BCTC/RF-EMC-005 Page: 58 of 60 Edition：A.3 EUT Photo 3 Report No.: BCTC2011000679-2E No.：BCTC/RF-EMC-005 Page: 59 of 60 Edition：A.3 16. EUT TEST SETUP PHOTOGRAPHS Radiated Measurement Photos Report No.: BCTC2011000679-2E No.：BCTC/RF-EMC-005 Page: 60 of 60 Edition：A.3 STATEMENT 1.The equipment lists are traceable to the national reference standards. 2.The test report can not be partially copied unless prior written approval is issued from our lab. 3.The test report is invalid without stamp of laboratory. 4.The test report is invalid without signature of person(s) testing and authorizing. 5.The test process and test result is only related to the Unit Under Test. 6.The quality system of our laboratory is in accordance with ISO/IEC17025. 7.If there is any objection to report, the client should inform issuing laboratory within 15 days from the date of receiving test report. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Tangwei, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China TEL：400-788-9558 P. C.: 518103 FAX：0755-33229357 Internet：http://www.bctc-lab.com E-Mail：[email protected] ※※※※※ END ※※※※※

Radiated Measurement Photos