GSM Controllers (19)
The GSM controller is a remote control switching device that can remotely open and close external gates, garage doors and other door entry systems from anywhere in the world by a simple free (it rejects your call so it is never answered) phone call or text message meaning no keys or pin numbers are required.
GSM controllers are often used at domestic properties or multiple occupancy properties as they are an effective way of controlling access to your property. You can store friends and families numbers (up to 200 numbers) for convenience and added security.