This mini DV supports circulating recording, you don' t need to delete previous videos. When a moving target appears in the monitoring area, the surveillance video recorder will automatically record. Specifications:  Material: metal Video format: AVI  Video coding: M-JPEG  Video resolution ratio: 1920X1080P, 1280X720P  Video frame rate: 30 fps  Player software: operating system or bring the mainstream video player software  Picture format: JPG  Image resolution: 12M (4032x3024) Image proportion: 4 : 3  Support system: for Windows me/2000/xp/2003/vista, for Macos, for Linux Battery capacity: 200mAh  Battery type: high capacity polymer lithium electricity  Working time: about 100 minutes  Interface type: mini 8Pin USB  Memory: TF card, up to 32GB (not included)  Item weight: 20g / 0.71oz Item size: 23 * 23 * 23mm / 0.91* 0.91 * 0.91in Package weight: 70g / 2.47oz Package size: 96 * 93 * 36mm / 3.78 * 3.66 * 1.42in Note: Please notice that this product do NOT includes memory card. The charging indicator is blue. Package list: 1 * Mini DV 1 * Manual 1 * Clip 1 * USB Cable 1 * Camera Mount