|The GSM Gate Opener is compatible with any new or existing gate automation systems. A simple telephone call (or text message) can remotely open or close your gates, and that call is completely free of charge. Any call from an authorised user's number is recognised by the GSM Gate Opener and triggers your gates to open. The GSM Gate Opener requires 12 to 24 volts AC/DC power and comes in a plastic housing and takes up to 512 user phone numbers.
All payas you go Sim card will be disconnected after 3 months if there is no outgoingcommunication, however with the GSM Opener will send a text message every 28days to make sure the Sim stays active. The text message will be chargedat your standard network rate normally around 10p, this means if you apply £10of credit to the Sim card it should last approximately 7 and half years.