Specification: Video Inputs: 4 Channels, Audio Inputs: 1 Channel Display Rate: 30fps(NTSC), 25fps(PAL) Recording Rate: 30fps(NTSC), 25fps(PAL) Compression Format: MPEG-4 Support full resolution video (768*576 PAL, 640*480 NTSC) Support IE Browse OS: Windows 98 / 2000 / XP