Universal GSM dialler for alarm systems, control panels, sensors and detectors. Our GSM gsm dialler are easy to fit and install to any device with outputs. The battery powered gsm dialler can be used anywhere without mains power. The mains powered gsm dialler also has back up batteries for use in the event of mains power failure. Our gsm diallers can be used with any type of sensor or detector to alert you by phone call or SMS texts alerts to a detection trigger activation.