Input Type 4BNC*1 Video Input(s) 4 channel, Screen slips: 1/4/9/16 Audio Input(s) 1 channel, Audio input via Microphone Recording Rate 120fps (NTSC), 100fps (PAL). Display Rate 120fps (NTSC), 100fps (PAL). Compression Format Mpeg4 /H.264 Multiple Cards 1~4 per PC Data Size 30-150M/h/ch Resolution Display: 640 X 480,352 X 288,320 X 240; Record: 640 X 480,352 X 288,320 X 240. Various Recording Modes Dynamic streaming or Static streaming recording (optional), Motion Detection recording, schedule recording, Alert recording,Remote recording and remote backup. Appointed Hard driver for backup available.