GSM door opener is a GSM switch remote control system which can activate automatic gates with a free call from you mobile phone. The users’ phone numbers are programmed into the device by SMS. The device recognizes incoming Caller ID and drop the call before switching. With this system you can authorize up to 99 mobile phones to open the gate at no cost. This system has two models N/O,N/C output.
1. Free charges. the
2. Multiple applications.
3.Can be operated from anywhere, no distance limit;