COMPACT emergency phonesBuilt-in speaker unitAvailable full range 10-30 Vdc or 230V Built-in batteriesCrystal-clear voice quality72-hours and low-battery alertsReady for connection over PSTN lineExpandible over 2G/3G/4G networkUp to 4 extra speaker units supportedMulti-language voice promptsMicro SD card for configurationRemote monitoring via PC-based e-stant SWHelpy Compact-TL (5HL-650)Autodialler in a plastic box, complete withspeaker unitback up batteriespower supplyalarm and reset pushbuttonsLEDs signalling alarm sent, alarm received and operation status