... camera systems Camera systems, CCTV systems, DVR systems, systems camera, 8CH DVR, H. 264 DVR, 8CH audio 1. Support 2 ... (optional)4CH input, 1CH output, with Alarm— DVR-9108LVS)Multiplex OperationLive display/record/playback/backup/network transmitRecording ModeManual ... built-in RS-485 portUSB MouseYESPower SourceDC 12VKey Lock(Password Protection)YESPower-down recovery functionYESSize(mm)325(W) x ...