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GSM‑RELAY‑4G is a 4G remote control switch connected to the 4G mobile phone network. The switch has seven independent relay switches and you can activates NO.1 relay switch by dialing its cell phone number or sending SMS text.

It will reject the call and turn on the device connected to it without answering, so no call charges will be incurred when dialing this machine. This GSM relay switch has its own number recognition function, and unauthorized numbers will be automatically ignored.

4G design, through 4G, 3G and GSM, this relay switch can work anywhere in the world and it can carry out remote password and password change. Digital programming can be carried out quickly and easily using SMS or the on-board quick teaching button.

All relay outputs can work in switch mode or pulse timing mode, and it support control mode or security authorization number control mode, you can easily programming in minutes by using mobile phone or PC software.

You can disable the SMS reply function to save money, and the switch supporte quipment history LOG check and custom commands.It has 2 mode output, relay output with call mode and relay output with SMS control.