... 4ch with display screen Built-in touch mouse DVR with display screenModel:ES-DVRC504A ... angle Resolution1280 * 1024 System controlBuilt-in touching mouse, IR remote controllervideo input4CHvideo output4CHaudio input4CHaudio output1CHRecording modeSimultaneously ... disk backup, UpgradeAlarm Input4CHAlarm Output1CHRemote Controlsupport remote monitor, playback, backup, record and parameter setting via ...