4 Channels Color CCTV DVR, Surveillance DVR: 1.with monitoring, playing and recording 2.4 alarm inputs,2 alarm outputs 4 Channels Color CCTV DVR,Surveillance DVR Features :Monitoring, playing and recording simultaneouslyFour alarm inputs, two alarm outputsSupports continuous, loop, timed and alarm recording Single and split images availableSupports P.T.Z control (RS485 port) and 2.5-inch SATA- ...