... 5L wireless intercom system,widely used in office,apartment/nursing home intercom for emmergency need. LB-5L wireless intercom systemFeatures:LB-5L interphone,intercom device1 ... be adjustable .widely used in office,apartment/nursing home intercom for emmergency need.Technical Parameter:Working voltage: DC12Working current ... -10oC~60oCRemind: MusicSize of device:200x200x55 LB-5L wireless intercom system