... 4CH H.264 Network DVR 1CH Audio input ,1CH Audio output Support TCP/IP protocal,PPPOE,DDNS ,USB 4CH,H.264 compression, support SATA HardDisk, Mouse, USB ... ,mobile phone live view via 3G net *4ch separate video display and compression,video simutanelously*1CH ... output;*Support TCP/IP protocal,PPPOE,DDNS ,USB*Supports 4-channel recording and playback at the ... x 220mm, about 1.5 KGs. 4CH H.264 Network DVR