Video Compression: MPEG-4 compression Video Input: 4 ch video input, system supports 4 cards at most, thus forming 16 channel, 100fps system Display FPS: 25 fps in PAL, 30fps in NTSC Recording FPS: 25fps in PAL, 30fps in NTSC Resolution: 640x480, 320x240 Compression:60M to 100M per channel per hour Playback: Different speed selectable Support transmitting the video signal through LAN, PSTN, ADSL, ISDN, etc. Support skimming and playback over image at long distance Can transfer through telephone line IO Alarm: 4 input, 3 output Software support 12 languages Operating System: Windows 98/2000/NT/XP