... GSM network, no distance limit to alarm.2. Support GSM mobile phone.3. Can per-set 5 phone numbers, if an ... arm, disarm, panic alarm5. Control the system by a mobile phone6. For weak GSM signal area an external antenna can be used ... and operated.8. GSM network communicated no need for fixe telephone line, suitable for cottage, house, shop, garage, etc.Technical Parameters:Static ...