This switch pack must not be confused with a dimmer pack. I initially purchased this item thinking it would be able to dim or have a varied voltage output controlled through DMX. The unit is rather large to think that inside it should only have four electrically controlled switches which are controlled from an on or off command by DMX, or an internal program which will by generated by a chip on a circuit board. This device could be made much smaller. However, the German/EU plugs are a much more secure fitting than other models that use IEC sockets. For use in the UK, it is worth making up adapter cables, such as Schuko - IEC/13a/15a/16a sockets. And of course switch packs do have their uses where dimmers aren't required, for example to control mirror ball motors, pyrotechnics or gobo rotators.