Model: JA-5004H Video input: 4CH Compression: H. 264 Frame/ch: 25fps/second(PAL) 30fps/second(NTSC) Display Resolution: 704*576(PAL) 640*480(NTSC) Recording Resolution: 352*288(PAL) 320*240(NTSC) HDD: 80~150M/ch/hour Total Frame: 100fps/second(PAL)120fps/second(NTSC) OSWindows 2000/XP Features: Compatible with Intel chip, AMD CPU; VIA chip motherboard. Video motionTracking automatically. Support Domain to remote. Support MAX: 4PC In one system.