GW Security VD2C4CH891CVI 4-Channel 1080p Preview 720p Realtime Varifocal Zoom Night Vision Dome Security Camera DVR System with 500GB Hard Drive (White) High Definition 4 Channel HDCVI (HDMI & VGA) DVR with Pre-installed 500GB Hard Drive (2) 720p High Resolution Outdoor/Indoor Varifocal 2.8mm-12mm Cameras (1280H*720V) up to 82' feet for Night Vision Support IE browser and mobile surveillance by phones with Andriod, Balckberry, WinCE, Symbian, and iPhone 1080P Preview,720P Realtime Recording and HDMI Port for High Resolution Viewing options 1 Year Warranty and Free Life Time Tech Support From U.S.A.