... standalone DVR 4 channels Realtime full D1 recording or 2 channels real time full D1 + 6 channels ... Android, Symbian and Windows mobile, module by USB 2.0 port Multiple control methods:front panel,IR remote ... controller,USB mouse Support 2*USB 2.0 port for mouse,backup,DVD-RW, ... /movable HDD/SATA HDD/DVD-RWInterfaceVideo Input4channelVideo Output2 channel TV output BNC,1.0Vp-p,75Ω,1 ...