16 channels dvr,suppport D1 format when recording for each channel 1. H.264 compression 2. Recording, view, playback, backup and network transmission at the same time. 3. Manual, schedule and alarm recording. cycle recording with self-overlap; adjustable recording bit rate from 32k~1152k adjustable frame rate of 1~25. 4. Alarm input for each channel; motion detection, sensor, video lost,and any abnormality alarm; alarm pre-record and prolonged record. alarm log self-saved, alarm snapshot to assigned IP. 5. Double streaming function. 6. VGA & BNC output; 2X USB 2.0; RS485, Ethernet port 7. Network: PSTN, ISDN, ADSL, LAN, and WAN.