Arrive on time! At first a bit septic, it was hard to believe that this LED lamp catalyzed in 30s ... and yet so! Product therefore small portable size, attractive design and easy to use (only one button). Catalysis all semi permanent polish (where there is written on LED / UV) and not the wise peggy products. :-) If I want to find fault, I can just add that we can put four fingers in the catalyst without the thumb because not enough room, and then do one inch, but I do not find this disturbing. In conclusion, the product that I highly recommend for beginners or not!