Dvr board 1) mpeg4 compression format allows 4 line video input 2) frame rate: A) pal: 25 fps B) ntsc: 30 fps 3) resolution: 640 x 480, 320 x 240 4) storage required: 60-100mb/line/hour 5) you can select different speeds when replaying forward or backward 6) signal alarm can be transmitted via lan or wide area network 7) remote playback functionality through telephone line, or internet 8) i/o: 4 inputs, 3 outputs 9) supports installing 4 cards, allowing for up to 16 lines of video input 10) supports 12 languages 11) operating system: windows 98/2000/nt/xp
