This is a 16 Channel 960H DVR. This Digital Video Recorder can record up to 16 CCTV analog cameras at 960H video resolution. You may set the frame rate to 30fps for each and every channel. 960H has a pixel size of 960 x 480px which is wider than your standard D1 resolution. Think of 960H as a wide screen movie and D1 as a standard TV, so with 960H you will be able to capture more on the left and right side of your recordings than D1.