The Gateway works via a USB cable that must be plugged into the mains power 220-240 V
Extra information:
A modem is a device that connects to your cable or telephone lines and translates the data or information from the Internet to your computer or connected device.
A router is a device that works with your modem to receive the data coming through the modem and send it wirelessly to multiple devices such as smartphones, tablets, game consoles, and computers. To simplify, when you connect to Wi-Fi, you connect to your router. Your router talks to your modem and in turn to your internet service provider.
Why take a gateway?
The main advantage of using a gateway is the simplicity of setting up one device (in this case the Smart lock). It is a one stop shop for internet connectivity. Instead of separate devices each doing part of the job, a gateway does it all in a tight, easy-to-manage package.