A139 3CH / 2CH

Dash Cam Support

Below is a collection of everything you want to know about this dashcam, covering manuals, latest firmware, FAQs and video tutorials.


Click the flag to download the chosen manual.


How to update firmware :

Format the card first and then download the bin file to the card and power the camera with the card inserted.

Firmware Update

FWA139A.bin (45.9 MB)
Version: V1.7_20220722

1. Refine WIFI stability.

2. Other small bugs fixed.

Frequently Asked Questions

Having a problem with the dashcam? Scroll down to find your answer

There are 3 options for infrared LEDs: On/Off/Auto. 

It is "On" by default, and videos shall be in white and black. 

You can short press the power button to switch the three options.

The default box comes with all the indispensable accessories you need, like the car charger and rear cable.

Optional accessories include HK3-C for parking mode, CPL to reduce reflections, Bluetooth Control for remote control, and VIOFO original cards.

If the camera is beeping continuously, it means the camera is not in the recording, most of such issues are related to the microSD card. You can try the instructions below to solve the issue: 

① Format the card to FAT32 first, you can format the card from camera menu settings or use the APP to format. For deep formatting, you can also use the tool to format the card deeply. 

If the issue is not solved,  we suggest you use a new card. You can refer to this when choosing a card.

② If you use more than 1 channel, please unplug the back cameras to test if an unstable connection causes the issue.

The issue may happen with some iPhones.

Please try to disable the VIOFO APP from accessing cellular data in the setup as the pic below.

Please also turn off phone VPN if issue persists.

Yes, all channels (Front+ Rear + Interior) can work at the same time, both in driving mode or parking mode, (while you can disable interior camera recording manually by long-pressing triangle button.) 

Movement detected by one channel can trigger recordings in all active channels.

① Please unplug all cables and plug again, making sure the connection is firm and steady, with no wiggling. 

② If the issue persists, please unplug the rear and interior cables, plug the rear cable to the interior port, and vice versa. This is for checking whether the interior nor the rear cam connection is unstable.

There are two ways to reset the camera: 

① Quick reset by the camera: Long press the yellow triangle and Wi-Fi button simultaneously.

② Click the “Reset Camera Setting” option on the app menu.

Yes, you can long-press the yellow triangle button to turn it off manually, and long-press again to enable again.

No, there is no CPL Filter for the A139 back camera.

There are three ways to format the card: 

① Quick format by buttons: Stop recording first, then long-press the REC button. 

② Click “Format SD Card” on the APP menu. 

③ Use the format tool on your PC, you can also download guiformat program  via the link below for deep formatting.


We suggest you format the card periodically to ensure the best performance of the camera. 

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