... modeRecycling record modeP.T.Z control functionUsers managementMulti-channel displaySupport 320x240 / 640x480 (NTSC), 352x288 / ... search mode. Users can search by date/time, camera, record mode, and random combination ... Support recorded files backup, delete by date/time, camera.Convenient to extend system functions by ... 0 portPacking contents: 4 channel USB2.0 DVR,USB DVR,DVR,Cheap DVR-EzCAP3104