Night Owl Security L-45-4511 4-Channel 960H DVR with 500GB HDD HDMI Output 4 Night Vision Cameras and Free Night Owl Lite App (Black) 4 Channel L Series DVR with Pre-installed 500 GB Hard Drive and HDMI Output 960H Recording Resolution (960 x 480) and Free "Night Owl Lite" App for Smartphone integration PC and Mac Compatible with Free Control Management Software Motion Activated Recording with Email Alerts 4 Indoor/Outdoor Cameras with 480 TV Lines Resolution and 11 LEDs for 30 ft. of Night Vision