Video System:NTSC/PAL Video Input/ Output:4-ch / 8ch BNC inputs / 1-ch outputs VGA: 1ch:1024x768 Audio Compression:8kHz*16bit ADPCM Audio Input / Output: 4ch/8ch RCA inputs / 1-ch outputs Display Frame Rate:NTSC:100fps / PAL:120fps(4ch) NTSC:240fps / PAL:200fps(8ch) Playback Resolutionn:PAL:CIF(352x288),D1(704x576) NTSC:CIF(352x240),D1(704x480) HDD interface:2pcs HDD Network Interface:RJ45 10M/100M Network Protocol: Support HTTP,SMTP,FTP,DDNS,DHCP,PPPOE USB2.0:USB mouse,USB disk PTZ control: Built-in RS485,support PELCO-P&PELCO-D.