Wireless GSM Farm alarm system with outdoor PIR movement detectors. This GSM farm alarm uses weatherproof external movement sensor to detect burglars and intruders. When the movement sensor is triggered the GSM dialler will alert your mobile phone by phone call and text message alert. Idea for use as farm perimeter security systems and long range farm driveway and road alarms to warn you of approaching vehicles or intruders. Protect you barns, stables and courtyards with out weather proof security systems.