... Audio & Video 2.7 Inch TFT Monitor 3.Support 2T SATA HDD 4.Alarm Function/support 3G mobile 5. video recorder ... interfaceSupport D1, HD1 and CIF recording resolutionADPCM audio compressionSupport triplex operation: record, playback, net ... RW & NetworkPTZ ControlBuilt-in RS485, support PELCO-P & PELCO-DAlarm ModeMotion Detection, Sensor triggered, ... LCD/DVR ,Standalone digital video recorder dvr