Car DVR 3 Cameras Lens 4.0 Inch Dash Camera Dual Lens suppor Rearview Camera Video Recorder Auto Registrator Dvrs Dash Cam Original4.0InchThree-way Car Camera FullHD 1080P RegisPodofo 4.0 Inch Three-way Car Camera Full HD 1080P Registrator 17Degree Wide Angle Dash Cam Video Recorder G-Sensor Dash 170 Degree Wide Angle Dash Cam Video Recorder G-Sensor Dashcam Black box Dvr 3 Way Camera Car DVR HD Video Recorder Camera Dual Lens with Rear view Registrar 4.0 inch Dash Cam02Night vision Camcord FAQ: Do I need manually turn on and off the dash cam? After the dash cam pro is connected to the cigarette lighter receptacle in the car, you do not need to manually turn on or turn off it. Every time when the car is started ie, the cigarette lighter port is powered on,the dash cam pro automatically boots up. The dash cam will turn off automatically when the vehicle is turned off ie, the cigarette lighter port is powered off.Some vehicle's cigarette lighter keeps being powered on even when the vehicle has been turned off, in this situation, you need to manually turn off the dash cam pro. And the next time you start the vehicle, you need to manually turn on the dash cam. How to observe the running status of the dash cam pro? Check the status indicator on the side of the dash cam. If the indicator is green, the dash cam is recording normally;if the indicator turns red, it means that the recording is abnormal. What memory card does Gmai and NVNUVU Dash Cam support? Gmai Dash Cam and NVNUVU Dash Cam support standard Micro SD card TF card with the capacity of 16GB to 64GB and speed at Class10 or above.Make sure you use high-quality storage cards from a known brand. The actual writing speed and capacity of the low-quality storage cards may be lower than declared. Video aren't normally saved to low-quality storage cards. We don't take any responsibility compatible for such cases. Why does it only record many 1 min video,can it be 2mins,3 mins, 4mins or longer? The video is 1 min each time.The reason is that the DVR will remove the earliest video automaticlly when your card is full.If the video is too long, maybe all the longest video will be removed.When you want to check some video especially some important time, you can not find anything there. Don't know how to use the Gmai&NVNUVU Dash cam? Please