Unfortunately, my initial euphoria has given way now of real disillusionment, because the LED light after only about two weeks !!! His ministry finally einstellte.Erst walked the red LED's no longer, then the blue and now no more.The product may be innovative, but unfortunately not very haltbar.Man called the '' planned obsolescence ''. Did it indeed of Pearl without problems get exchanged, but also the second lasted only about two weeks at about 1-2 hours daily betriebs.Das problem seems there but probably already known and to be an isolated case, since I needed not even return the defective unit !! ... It was believed me so ... !!