MPEG-4 compression, 4ch Video input, 1ch Video output; 2ch Audio input, 1ch Audio output; 4ch alarm input, 1ch alarm output; Recording Mode: 704x576, 25fps(PAL), 30fps(NTSC); Storage: Hard disk drive (2.5 inch); Ethernet: 10/100 Base-T, RJ-45; PTZ Connector: RS485; Language: English/Chinese; Power in: DC, 8V~32V; Power out: 12V, DC, Max Current 3A; Working condition: Temperature:0~60℃, Humidity: <90%; Multi task mode: Live video, recording, playback, alarm, backup simultaneously;