Night Owl Security B-AZ4-4HD7-1 4-Channel Smart HD Video Security System with 720p HD Cameras (Black) 4 Channel 720p AHD DVR with pre-installed 1TB hard drive 4 x Indoor/Outdoor Hi-Definition 720p bullet cameras with Wide Viewing Angle Cameras with night vision up to 100 ft. No re-wiring required, use your existing analog cables and 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!