... smart search> 3D intelligent positioning with Dahua PTZ dome camera> Support 8 SATA HDDs up to 32TB, 1 eSATA ... Detection, MD Zones: 396(22×18), Video Loss & Camera BlankAlarm Input4 channel8 channel16 channelRelay Output6 channelPlayback & BackupSync Playback1 ... play, Slow play, Next file, Previous file, Next camera, Previous camera, Full screen, Repeat, Shuffle, Backup selection, Digital zoomBackup ...