Software MPEG-4 compression 4-ch Video Input, with tv-out Display Speed: 25fps/PAL, 30fps/NTSC Recording Speed: 25fps/PAL,25fps/NTSC Record Resolution: 752x288 32bit true color File Size: 0.8K~1.5K OS: Windows 98/Me/2000/XP IE remote view function Software H263 Compression 4-~16ch Video Input Display Speed: 25fps/PAL, 30fps/NTSC Recording Speed: 25fps/PAL, 30fps/NTSC OS: Windows 98/Me/2000/XP VGA Out resolution: 1024 X 768 Video Compression: Motion JEPG Image resolution: 320 X 240 or 640 X 480 pixels Sensor input/Relay output device: up to 8 inputs and 6 outputs Recorded Video Format: DSS Recorded Audio Format: WAV OS: Windows 98/2000/XP