With the aid of the 500W radio-controlled universal dimmer FD3 U1, incandescent lamps and halogen lamps with Tronic or conventional transformers can be switched and dimmed wirelessly. The dimmer can also be operated just like a conventional dimmer by means of a local, wire-connected push button. When the mains voltage is connected, the FD3 U1 detects the connected loads and automatically selects the appropriate dimming mode. Adjustable soft-on or soft-off function, central control and further programmable switching and dimming functions permit extremely comfortable and versatile control of lights.