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. Features: Compact design, support motion detection. Built-in lithium battery supports sustainable camera whose duration is up to 100 minutes. Suitable for all occasions such as having lessons, meeting, taking part in concert, and interviewing and so on. Lightweight and easy to carry, this mini DV supports TF card (not included). 720P high definition pixel and 90 wide angle lens. Specifications: Color: black, red, blue (optional) Material: metal Video format: AVI Video coding: M-JPEG Video resolution ratio: 1280 * 720P Video frame rate: 30 fps Player software: operating system or bring the mainstream video player software Picture format: JPG Image proportion: 4 : 3 Support system: for Windows me/2000/xp/2003/vista, for Macos, for Linux Battery: 3.7V, 200mAh Working time: about 100 minutes Interface type: mini 8Pin USB Memory: TF card, up to 32GB (not included) Item weight: 20g / 0.71ounce Item size: 23 * 23 * 23mm / 0.91* 0.91 * 0.91in Package weight: 70g / 2.47ounce Package size: 96 * 93 * 36mm / 3.78 * 3.66 * 1.42in Note: Please notice that this product do NOT includes memory card. Package List: 1 * Mini DV 1 * Manual 1 * Clip 1 * USB Cable 1 * Camera Mount