The dimmer is delivered in a known Busch Jaeger packaging. The packaging contains the dimmer itself also a very well-to-read description. The dimmer is easy to install in a few steps. At full brightness it gives no sound and also in the dimmer mode, it is very quiet and under normal circumstances, the quiet whirring in dimming inaudible (unless you go to the right ear very close to the dimmer). The minimum brightness can be adjusted directly via a small potentiometer on the dimmer, which is very convenient. The dimming setting takes place in small, very light grid settings. Is used by us to dim high-voltage halogen lamps and is functioning properly.