With the Fibaro Relay Switch 1 x 2.5kW you can control a connected device of up to 2500 watts remotely. Place the built-in switch in the built-in box of your existing switch. Thanks to the built-in switch, you suddenly make your existing switch smart. Since it is a relay version, you switch every voltage. You operate the switch wirelessly via your Z-Wave controller or simply via your existing switch.