The QWZ-PPE/BE is an intermediate socket that can switch up to 16A. You can use this smart socket to easily turn a connected device on and off. As soon as you plug the smart socket into a normal socket, you can locally turn the connected device on and off using the button on the socket.
Because the smart socket has its own energy measurement and can be easily moved, you can measure the energy consumption of multiple devices at different locations with just a single socket.