oVideo input :4 channel video inputs with BNC oAudio input :2 channel audio input with microphone oSurveillance Channel:4 cards can be inserted in the same PC at most, to form 16 surveillance screen real -time display modes oVideo resolution :640 X 480, 352 X 288, 320 X 240 ( both view and playback ) ocompression mode :Latest MPEG-4 / H.264 oCompression ratio :60-150M/C/H (60-150M of hard disc each channel per hour) ovideo total frame rate:120fps in NTSC, 100 fps in PAL for display and recording oOperating System:Windows2000 Professio nal / Server / XP oNetwork protocol :TCP/ UDP oNetwork Port : 9000/9001/9002