GS-MP16 16 Channels, Displaying: 25frame/second, Recording: 25frame/second, MPEG4 compressed, wIth audio, Alarm input GS-H264 4CHannels, despaying: 25frame/second/channel, Recording: 25frame/second/channel, H264 compressed, with audio GS-404HD 4Channels, despaying: 25frame/second/channel, Recording: 25frame/second/channel, Mpeg4 compressed, with audio GS-416 16 channels, Displaying: 25frame/second per channel, Recording: 12.5frame/second per channel, short wave compressed, w/o audio