1,4CH CCTV camera 2, H.264 compression CCTV camera 3,10 languages 4,suppore symbian ... ,windows mobile, iphone,android phone Specification:4CH,H.264 compression,support SATA HardDisk, Mouse,USB*1,network,Audio, RS485 ... view via 3G net *4ch separate video display and compression,video simutanelously*1CH Audio input ,1CH Audio output* ... Remote 4ch H.264 support D1 3G cell phone view and Network CCTV DVR