Door openers can be used to authorize access control, control , remote device switching, parking systems. In fact, door opener can be used where you need to remotely open/close systems, machines, equipment with free calls on your mobile phone and protect your assets. Simply dial an authorized user number to open barriers and doors, or open or close the machine with a door opener. With no call charges, the door opener rejects calls from authorized numbers and then performs an open/close operation. Multiple application, bollards, barriers, garage doors, shutters and access doors or machines, Manufacturer: DMETE