7PrefaceFeaturesThe Digital Disk Recorder WJ-HD88 is a professional security product with eight video and audio inputs. It is capable ofrecording high-quality video/audio data over an extended period of time. In addition to image recording and playback, themany features of the WJ-HD88 include motion detection, external alarm recording, remote operation via a network, and net-work communication. An RS485 interface is provided for connection with peripheral devices.The recorder can be controlled by the system controller WV-CU650.Disk configuration: Up to 8 hard disks can be installed2 hard disks factory-installed (WJ-HD88/G5)4 hard disks factory-installed (WJ-HD88/G10)Live monitoring: Single channel live monitoring (CH 1-8)1-, 4-, 6-, 9-split screenCamera controlRecording mode: Manual recordingTimer recordingPower-on auto recordingTerminal recordingMotion detection (VMD) recordingRecording quality, frame rate, stream type setupCompression methods: Video: MPEG-4Audio: ADPCMPlayback mode: Single channel playbackTime & date search playbackNetwork remote playbackRemote download and local playbackPlayback after backupNetwork monitoring: Live monitoringRemote playbackCamera controlLive network communicationOthers: Password key protectionRunning log recordOriginal heat radiation designOperable using the connected system controller