Defender Sentinel 8CH 500GB Smart Security DVR Including 4 Hi-Res Indoor/Outdoor Cameras with 75ft Night Vision,21028 Record over 2 years' worth of footage on the included 500 GB hard drive High-resolution cameras provide crisp and detailed video Monitor up to 75 feet away in complete darkness with automatic night vision Easily connect to DVR with 65-foot cables to allow greater flexibility in camera situating