... Electronic zoom in live* Build-in E-map view * Support alarm email function* Dual stream bit * 8pcs SATA HDD, eSATA extension ... Basic,Medium,Good,High,Best)ModeManual, motion detection,Timing, Alarm trigger, Auto start, and so on.Video output stream16K-2Mbps adjustablePlayback4 CH ... ,DHCP&DDNSUSB port3 USB2.0 ,support mouse, flash memory,Remote HDD and DVD writerCommunication port 1 RS232 port , 2 ...