... phone network!STANDARD PACKAGE:* 1 x 7CH GSM remote control relay panel(GSM 850/900/1800/1900MHz Quad Bands ... the remote control of heating in holiday homes, lighting, engine pre-heaters, aviation engine heaters, irrigation systems, water well pumps, pumping ... stations, cabin heaters, resetting of remote servers, arming and disarming security systems, access control of gates ...