The dimmer itself is technically flawless. It is a phase dimmer. This is extremely important for the use of electronic transformers and Led lamps. During normal dimmer, so a Phase dimmer dimmer waits after current zero a few milliseconds, and then turns hard. This steep slope would destroy even dimmable LED lights permanently. Not so with this Dimmer.Er switched at the zero crossing an already, the current rises softly, after a few milliseconds on the dimmer used.The LED lamp is hardly loaded. Comparable brands Dimmer cost 60th Packaging is an impertinence. I also had to think for a while, as the unit is freed for mounting the cover. The lid can be very difficult to pull forward. Also missing instructions for electrical connection. Not interpret the symbols on the Dimmerkonnte I as a state. Expertized. Electrical engineers, they do not correspond to known standard! On the website there is an exemplary sheet. This delivery must be accompanied by! The CE marking requires it !! Also please a sketch like the lid to be removed settle, then there would be 5 star!