Yale Premium Telecommunicating Alarm is a basic keypad operated system ideal for a flat, terraced, or semi-detached and detached home. This alarm will alert upto 3 phone numbers of your choice about any intruders and can be managed from your phone. An access code on the keypad can be used to enable and disable the alarm. A preset 20 second exit/ entry period will allow the entire property to be either armed or disarmed, and has a 30 metre range. It uses easy to use alkaline batteries and average battery life is over 2 years. Up to 20 devices can be connected to this alarm system.