Dedjgoo 1 PCS Blue RTU5024 GSM Gate Opener Automatic Gate Access Controller 4G GSM Gate Opener Free Phone Garage Remote Control

4. Secure - Using caller ID for identification, unknown callers are ignored; No need to provide a remote control for different users; Features: 1. No call charges. The 4GLTE Gate Opener rejects the call from authorized number then carries out the turn ON/OFF action on the first 'ring; 2. It is no longer traditional to open the door, but it is more interesting to open the door by shaking it. 3. Multiple applications. (gates, bollards, barriers, garage doors, shutters and access doors or machines); 5. Can be operated from anywhere, no distance limit; Add or remove users by SMS Text ;, Manufacturer: Dedjgoo