Video In Standard 8 channels video in BNC jack Audio In Standard 8 channels audio in RCA jack Video resolution NTSC 640x480 / PAL 704x576 Compression Technique H.264 DSP compression Chip. Dynamic Compression rate can reach 1:40~1:2400 max PC Interface Standard PCI Slot Watchdog Hardware type watchdog function I/O Each card provide 8 I/O points Recording Speed Maximum of 480 fps for 16 channels OS system Windows 2000/XP/Vista