Night Owl Security B-A720-41-4 4 Channel HD Video Security System with 1 TB HDD and 4x720p HD Cameras (Black) 4 Channel 720p AHD DVR with pre-installed 1TB hard drive 4 x Indoor/Outdoor Hi-Definition 720p bullet cameras and Wide Viewing Angle Cameras with night vision up to 100 ft. No re-wiring required, use your existing analog cables. Backwards Compatible- Compatible with both Night Owl HD analog and industry standard analog BNC cameras. View & Playback footage directly from your Smart Device US Based 24/7 - 365 days a year Technical Phone & Web Support, NO monthly fees. Night Owl will pay freight both ways on any defective product for warranty replacement (EZ Return).