GSM/4G Single-Relay Gate Opener — Remote Control for Automatic Sliding & Swing Garage Gates

Remote-control gate opener with GSM/4G connectivity and a single relay for switching automatic gates. Calls from authorized numbers are rejected and the relay toggles (ON/OFF) on the first ring, so there are no call charges. An alternative unlocking method lets you shake your mobile phone to open the door. Suitable for a wide range of uses including gates, bollards, barriers, garage doors, shutters, access doors and machines. Security is handled via caller ID: unrecognized numbers are ignored. Can be operated from anywhere with no distance limitation.