Swann SWDVK-410004-US 1000 4-Channel D1 DVR With 500GB Hard Disk Drive and 4 Cameras At 600 Tvl, Black Includes 4 High-resolution Cameras With 600 TV Lines, 1/3" Swann True Color(tm) (stc) Video & Powerful Ir Night Vision Expandable Up To 4 More Cameras For Full 8-channel Viewing Records Continuously From 8 Channels For 15 Days+ Onto A 500gb Hard Drive, Even Longer With Motion Detection Includes 60ft Coaxial Cable Per Camera Easily Locates Incident Video & Transfers To External Storage Via Usb, Esata Or Network