Top of the range intercom system. When fitted with any sim card (pay as you go or contract) can be programmed with up to 10 numbers which it will call until someone picks up. These can be home or mobile numbers and the gate can then be released from any location. Can be programmed so that after a certain number of rings it will then move onto the next number until someone is found to release the gate. Does not require any wiring from the gate to house.