junsun 4" HD 1080P Car DVR Dash Cam 170&deg; Wide Angle Dashboard Camera Vehicle Recorder Dual Lens recording + Rear view Night Vision with ADAS Frequency:DUAL600MHZ 32-bit RISC LCD size : 4.0 inch LCD resolution of : 480 * 854 GSENSOR : GMA301; SC7A30 Work power : 600ma Operating temperature range : -10 ~ 65 degrees Storage card : capacity up to 32GB Standard voltage : MINI 12V Battery capacity : 600MAH USB interface : MINI Built-in image sensor : 200W Rear camera resolution : 1920 * 1080 Lens viewing angle : 170 degrees Video resolution : 1080P (FHD1920x1080), 720P (HD1280x720) Camera resolution : 12M (4032x3024), 10M (3648x3726), 8M (3264x2448), 5M (2592x1944) Storage Compression Mode : H.264 Video format : MOV Image format : JPG It is strongly recommended that you first turn on the device before using it for the first time, then insert the memory card for formatting. The internal battery is for backup only. It may not work for a long time if you power off the car engine. Please plug the car charger while use it. Memory cards can only use high-speed cards above class 6 level.(recommended to use class 10) Press &#034;reset&#034; button to restart for preliminary solution, if there is any system error or crash. 1x Dash Cam 1x Rear View Camera 1x Main Wire 1x Suction Cup Mount 1x Car Charger 1x Screw / Gum Paste This Car DVR has two cameras that allows for simultaneously recording videos from two different angles. Picture in Picture display will let you have clear view from front and back-up camera . When the car in Reversing Gear, this car dvr will automatically switch to the back-up camera image view with parking line. Front + Rear Dual Lens Cam Mode, Top Quality 1080P30 fps front + 720P rear camera record full-HD Video , super wide front 170 + rear 140 angle,dash cam can automatically record hands-free in a continuous loop. HDR presenting more details from shadows to hightlights in moving, delivers great sharp video quality and super night vision, clearly captures the license plates cars as well as road signs during the day and night. This feature enables users to optimize their data by having the newest video overwrite the oldest video in sequence with 1, 2, or 3 minute intervals. Locked files will not be overwritten. Highly-sensitive G-sensor automatic record videos and lock up the videos in recorrding when a collision or crash is detected, G-sensor can be set to low, mid, high or off. In parking, the device is automatically turned on and recording when a vibration is detected HD Square Waterproof rear-view lens plate camera with extra-long 255 inch / 6.5 m cable included, it can be installed inside the cars rear window or outside of pick-up truck when reverse is selected.(Rear camera connection directions: Connect the red wire to your tail light&#039;s positive electrode).