Loop Recording:When this feature is turned on, the memory card is full and the oldest video will be overwritten by the recorded video.However, videos under conditions will not be overwritten, such as G-sensor, Parking Monitoring. G-Sensor:When your car is subjected to an impact or other emergency, the G sensor is triggered, so that the recorder immediately records and locks the video. :With the function is enabled, when the Car DVR detects a moving object, it will automatically recording video. When there is no moving object, it will stop recording and detect the moving object again. Super Night Vision:Super Night Vision, IMX323 sensor 1/2.9 inch light- components, 4 IR lights, f/1.8 and 6-glass lens, can capture clear videos and photos even in low-light night conditions. Specifications: Sensor: CMOS sensor Lens: 140A+ high-resolution ultra-wide-angle lens Display size: 3 inch IPS screen Power interface: DC 12V/1A Storage temperature: -30- 70 Loop recording: seamless loop recording External storage: support 16GB-32GB (not included) USB interface: mini USB Video : : JPG Front and rear camera resolution: 1080P/480P Video resolution: 1920*1080 1080P, 720P lens:dual lens : ABS colour: black Package Contents: 1 x driving recorder 1 x rear camera 1 x bracket sticker 1 x car charging power line 1 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.