... 2 x 2048MB SATA HDDMultiplex OperationLive display,Record,Playback,Backup,Network Transmit,Mobile ViewRecording ModeManual,Timing,Motion Detection ... ,USB Movable HDD,Network,USB DVD -RWPre-alarm RecordingAbout 10 seconds before alarmNetwork ProtocolTCP/IP,PPOE ... 2(IR ON)S/N Ratio>48DBWhite BalanceAutoAGCAutoElectronic shutter1/50sec~1/100,000secPower SourceDC12V, <2000MA 16CH H.264 DVR Day Night Camera ...