Swann SWDVR-81000H-US D1 Advanced Series 8-Channel DVR (Black) Expandable Up To 8 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 and Transfers To External Storage Via USB, Esata Or Network Customizable Network Configuration Live Viewing Through Free App On 3g/4g-enabLED Smartphones and Tablets Including iPhone , iPad , Android Devices, Blackberry Devices and More