2020-09-04 00:00:00 1) Free charges. the call from authorized number then carry’s out the turn ON/OFF 2) Control 2 devices(Gates, bollards, barriers, garage doors, shutters and access doors or machines); 3) Secure - Using caller ID for identification, unknown callers are ignored; 4) Can be operated from anywhere, no distance limit; 5) Call in to be users in 30 mins when the storage mode start,or admin send SMS to add/remove the users.