Q-See QT714-4C10-2 4-Channel 1080p SDI  Surveillance DVR System with 4 HD 1080p Cameras and Pre-installed 2TB Hard Drive (Grey) 4 Channel 1080p SDI DVR with Pre-installed 2TB Hard Drive 4 High Definition Cameras with 1080p Resolution and 50' Night Vision/120' in Ambient Light All-Metal Weatherproof Cameras for Indoor and Outdoor Use Free Q-See Apps for iPhone, iPad, Android, Blackberry and Windows Mobile HDMI Port for High Resolution Viewing options