1) H.264 compression format
2)support SATA hard disk,and USB Mobil hard disk
3) Video input:4 channel, Video output: 2channel
4)Audio input: 4ch, Audio output: 2ch (RCA)
5) Alarm input: 4chAlarm output: 1ch
6) NTSC, PAL
7) support: mouse
8)Multiple recordingmodes: record by time, record by motion detection and automatically recording,mandatory recording
9)Recording frame: NTSC:60 f/s PAL: 50 f/s
10)internet function: IE browser real time monitoring, monitoring by mobilephone
11) network protocol: TCP/IP/UDP/DHCP/DNNS/PPPoE
12)Search/replay bycase list and accurate time
13) Build in RS-485 interface, support PELCO-P,PELCO-D
14)Infrared remote control is optional
15)VGA can be order (priceis different)
16)USB back up
17)Remote control
18)DC12V/3A