Audio gateway, based on mobile communications, for connecting to an existing announcement or amplifier system. Allows you to make live audio announcements via telephone/mobile phone (GSM network) from any desired location.Quick, efficient and location-independent information transmissionSecure access due to authorised telephone numbersEasy installation via plug-and-playRelay output NC, max. ˜ 125 V/500 mA, DC current 110 V/300 mASMA antenna connectionAudio output: 3.5 mmA SIM card is also required for operating the AUDIO-GATEWAY (not supplied). Minimum operating costs because it only receives callsBattery compartment for 4 x rech. NiMh backup batteries AA size (not supplied)Power supply via external PSU ( DC current 10-16 V/1 A)Matching PSU PSS-1230DC is available at option]]>