Swann SWDVR-41000H-US 1000 4-Channel D1 DVR (Black) Expandable Up To 4 Cameras For Full 8 Channel Viewing Records Continuously From 8 Channels For 15 Days+ Onto A 500gb Hard Drive, Even Longer With Motion Detection Easily Locates Incident Video & Transfers To External Storage Via USB, Esata Or Network Customizable Network Configuration Live Viewing Through Free App On 3g/4g-enabled Smartphones & Tablets Including Iphone(r), Ipad(r), Android(tm) Devices, Blackberry(r) Devices & More