Swann SWHDK-482004-US Platinum-HD 1080p Sdi DVR with 4 Shd-870 Cameras 4 Channel (Black) Model No. Swhdk-482004 4-channel Blue-lit Sdi Dvr With Hd 1080p Video recording & Streaming Over The Internet Real-time 30 Fps Per Channel Viewing & Recording In 1080p Full Hd 2tb Hard Drive With The Ability To Expand Up To 4tb