a state of the art expandable surveillance system with 1080p hd resolution set forget by recording from 8 cameras for 160 days onto a 2tb hard drive just add swanns pro h855 h856 t800 series cameras enjoy high definition recording playback save time have peace of mind by easily locating incident video then transfer to external storage via usb or network view live or playback video in high definition on your hdtv lcd screen or monitor via hdmi connection or vga p