With h.264 compression, smaller stream, higher quality, longer recording time. 16ch support 16ch d1 playback at the same time With unique front panel and time screen, 16ch support 16 d1 @25fps video recording. Support symbian s60v3/v5, windows mobile, iphone, android, blackberry mobile view. Support 1sata hdd ( 3tb), 2 usb(2.0) interface for backup, burning, upgrading operation Stronger network service, support ie browse and cms software Support chinese, russian, english, italian, portuguese, spanish, french, german ..... . 30 language Build-in 3322.Org, dyndns.Net, oray.Net and myq-see.Com free ddns dynamic domain name> with hdmi, support 1080p the high-definition (1920 * 1080p) With hvr, nvr function, support 4*1080p/8*720p/24*d1 ip camera Support p2p function 370(width)*315(deep)*55(hight)mm 4kg(not including hdd)