GW Security VD4CH4C50WD 4 CH 960H DVR Surveillance Camera System with 4 x 700 TVL 2.8-12 mm Varifocal, 196-Feet IR Day/Night Outdoor Security Camera (Grey) 4 Channel 960H Real-time High Definition HDMI & VGA DVR with Pre-installed 1TB Hard Drive (4) 900TV Line Outdoor/Indoor Camera with up to 196 feet night vision Support mobile surveillance by phones with Android, Blackberry, iPad, Symbian, and iPhone Built in 2.8~12mm Manual Zoom Varifocal Lens which allow you to adjust the angle of View Easy installation with 1 Year Warranty and Free Life Time Tech Support From U.S.A.