Q-See QT534-4E4-5 4 Channel Full D1 Surveillance System with 4-960H/700TVL Cameras and Pre-Installed 500GB Hard Drive 4 Channel DVR with Real-Time Full D1 Resolution 4 Cameras with 700 TV Lines of Resolution and 100 feet of Night Vision HDMI Port for High Resolution Viewing Options (HDMI cable included) Free Apps for iPhone, iPad, Windows Phone and Android. Mac and PC compatible Pre-Installed 500GB Hard Drive 4 Channel DVR with Real-Time, 960H and Full D1 Resolution 4 Cameras with 700 TV Lines of Resolution and 100 feet of Night Vision HDMI Port for High Resolution Viewing Options (HDMI cable included) Free Apps for iPhone, iPad, Windows Phone and Android. Mac and PC compatible Pre-Installed 500GB Hard Drive