Night Owl P-45-4624N 4-Channel 960H DVR with 500GB Hard Drive and 4 Hi-Res Cameras (Black) Pre-installed 500GB hard drive 960H recording resolution (960 x 480) HDMI output Smartphone, Tablet, PC and Mac compatible Motion Activated Recording with email alerts Pre-installed 500GB hard drive ^960H recording resolution (960 x 480) ^HDMI output ^Smartphone, Tablet, PC and Mac compatible ^Motion Activated Recording with email alerts