... , linear output,Audio Input1 channel external MIC interface( internal sound pick-up)Device StorageMicro SD(TF),SD 2.0 SDHC standard, maximum ... temperature sensorClock displayBuilt-in clockOther FunctionsAuto flip, Auto parking, Power up action etcCommunicationRS-485ProtocolPelco-D, Pelco-P( optional)Privacy Zone4 zonesAlarm ...