Dvr2000 series audio 1.Mpeg-4/h.264 video hardware compression; 2.Cif real-time recording, d1 recording not in real time; 3.Code flow reaching from 60m to 200m/h; 4.Installing alarm input/output module; 5.Using the watchdog to avoid the computers halt; 6.Supporting cbr and vbr, 500:1 compression ratio; 7.90 rotation supported