The GSM relay is connected to the cellular network, and controlled by phoning to it, or sending an SMS. The relay can be setup in 4 different modes, which makes it possible to activate it by calling to the device. Another way is to control it with SMS.
The unit is protected, as you need a password to change the setup, and you code one phone number that can activate the relay.
The relay is easy to connect and setup. The manual is easy to follow, and the setup only takes a few minutes.
We recommend SMS SIM card from Greentel, where you should pick a service with only SMS. The device will still be able to accept phone calls.
A small GSM antenna is connected, and it can be mounted with the double adhesive tape already mounted on it. It is also possible to replace the antenna entirely.
Relay that is connected via cellular network, and that is controlled by phonecalls or SMS messages.
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