H.264 Main Profile, 8ch video input,8ch audio input,2 SATA HDDs support,USB 2.0,VGA,RS-485. 2CHxD1 real time, 6CHxCIF real time, dual encoding streams, smart phone monitoring(windows mobile &Symbian& iPhone&Google Android)8 CHANNEL PLAYBACK, TV,VGA OUTPUT, 1U CASE,PAL/NTSC.