G840S 4K provides three resolution options:
4K(front) and 1080P(rear)
2.5K(front) and 1080P(rear)
1080P(front) and 1080P(rear)

The reverse line of G840S 4K can be adjusted by sliding the line on the screen according to the actual situation. It supports two reversing modes: Full-screen display and Panorama display, which can be switched by clicking the icon in the lower right corner of the reversing image. With the Full-screen display turned on, the reversing image will be automatically enlarged by 1.5 times. With Panorama display turned on, the reversing image will not be enlarged and show the actual distance.

Please note: Under Panorama display, the reverse line cannot be adjusted and saved.

1. The front camera behind the mirror can get more angles by moving it slightly, and the rear camera by changing the installation position.
2. Swipe the the screen up and down to get more viewing angle.
3. The rear camera image can be mirrored or flipped

The brightness of the screen can be adjusted by clicking the "brightness icon" on the screen.
 The current version of the G840S 4K does not support the zoom function.

The rear camera is waterproof, and you can get a clearer view in the rain by spraying water-repellent spray on the lens. It is recommended to protect the camera when washing the car, as high-pressure water vapor may seep into the inside of the camera.

The current version of the G840S 4K is not equipped with LDWS and ADAS

The current version of G840S 4K is not equipped with WIFI and APP

Usually the rear camera is installed above the license plate to get the best viewing angle and image, it can also be installed inside the car. License plate brackets are currently available on our website.

The parking monitoring mode of G840S can provide protection for your vehicle after parking. Parking mode: With this option turned on, the dashcam will enter time-lapse recording mode after parking. its working time can be set as 12H/24H.

Enabling Park Monitor Mode requires the installation of a hardwire kit, which can be purchased on WOLFBOX or obtained from our support. After installing the hardwire kit, there will be an option of "Parking Mode" in the menu.

PLEASE NOTE: Correct installation of the hardwire kit is required for Parking Monitor Mode to work properly. The basic installation method is that the yellow wire of the hard wire kit is connected to B+ or a fuse with a constant power supply, the red wire is connected to the ACC fuse, and the black wire is grounded.

Normally, "Will enter time-lapse " will be displayed on the screen after the car is turned off. When you touch the screen again, it will prompt "ACC is off, not operate" If Time-lapse is enabled, the video recorded in the parking monitoring mode can be found in the normal file after the next boot. If the Collision boot recording mode is turned on, you can try to shake the mirror after it enters the parking monitoring mode, and then turn it on to check whether there is an emergency recorded video in the locked folder.

1. Please restart the car, then the dashcam will automatically exit the parking monitoring mode.
2. If restarting the car fails to exit the monitoring mode, please contact support to obtain software to solve it. It is recommended not to cut off the power directly to let the dashcam exit the parking monitoring mode.

In order to avoid new videos not being saved and frequent formatting of the TF card when the TF card is full, the dashcam turns on the loop-recording mode by default. In this mode, the recording time of each video can be manually set to 1 min, 2 min or 3 min, and when the TF card is full, the new video will automatically overwrite the old video to achieve loop recording.

Possible causes and troubleshooting steps:
1. Check whether there are damaged video files in the TF card on the computer, and delete them if any.
2. Insert a new TF card.
3. If the new card does not solve the issue, please try to upgrade the firmware of the mirror to the latest one.
4. If the above steps cannot solve the issue, please seek further support from us.

With the G-sensor, the dashcam will automatically record an emergency video and save it in locked file when it detects that the vehicle has been collided. The sensitivity of the G-sensor can be adjusted in the menu.

Possible reasons:
1. Please check if the AV input on the top of the mirror is broken.
2. Please check whether the rear camera cable is obviously damaged, especially at the cable interface to see if the 4 pins are broken.
3. If there is no abnormality after inspection, please contact us for support.

Possible causes and troubleshooting steps:
1. If the mirror does not turn on after updating the firmware, it may be that the mirror has been installed with wrong firmware, please contact support to get the correct firmware.
2. Please confirm whether the power port on the top of the mirror is damaged or not.
3. Please unplug the GPS, TF card and the rear camera cable, and use a new charger with a compatible interface to power the mirror to see if it can be turned on.

Possible reasons: Warning sound of Fatigue reminder or Speeding reminder. After plugging in the GPS device, the dashcam will give out a warning sound when speeding. Fatigue reminders can be turned off in the menu.

Please make sure that the layer of film on the lens is torn off and wipe the lens with a cleaner. Get an upgraded WDR rear camera to reduce glare