Findway&reg; Professional Full HD Car Black Box Car DVR Camera Recorder 1080P with Wide Angle Lens Support G-sensor Motion Detection Loop Recorder LED Night Vision HDMI Output Made of Aluminum-magnesium alloy shell, very durab Motion Detection: It starts recording automatically itself if there is motion in the video without pressing any button Loop Recorder: when the TF card has no memory, it will delete the earliest video automatically and then continue shooting Car Plate Stamp: your car plate number will be marked in the video