12inch IPS Full Touch Screen - G840S mirror dash cam adopts Full HD resolution of 3840*2160P, which can record more vivid videos for your wonderful trip. the rear view camera has 12” touch screen, it can not only easily slide and operate settings, And it can clearly display the front and rear vehicles and surrounding road signs, etc. WDR Tech Improves Night Vision - G840S dash cam mirror with an F1.8 large aperture & advanced Sensor, the rear view mirror dash cam applied an upgraded low-reflectivity LCD to reduce reflection during the day. and is equipped with WDR/HDR technology, the vehicle's environment is clearly visible in bright or backlit scenes, and vivid images can be captured even at night. G-Sensor/24H Parking Monitor - G840S mirror dash cam front and rear with built-in G-Sensor. When an external impact or the collision hits the car reaches the sensing level set by the G-Sensor, it will automatically activate and start recording a 1min lock-on video. In addition, The dash cam can achieve monitor all-around the day, if you want to turn on the 24-hour parking mode, you must connect the hardwire kit (ASIN, B09X1L1GMX), so that it allows you to park with confidence. Super Capacitor/Loop Recording - Mirror dashcam is powered by a super capacitor can withstand extreme conditions, and can avoid the phenomenon of battery bulging, explosion, and use the lifespan is also longer than the battery-powered car cam. Loop recording can keep record video all the time. When the SD card is full, the latest video will overwrite the oldest video to ensure that the mirror recorder can keep recording all the time. The car dashboard supports a max 128GB card. Mirror Flip & Upside Down - The rear view mirror camera adds the latest exclusive functions, which can provide you with mirror and upside down of picture. More accurately grasp the driving status of the vehicles behind to ensure our safety. You can adjust it according to your actual situation, so it can be perfectly compatible with pickups, RVs, and trucks.