How do you want to rate a product if it was not not use them? General in Germany including new purchase should included a warranty period of 2 years, everything else goes very in the direction that the production quality could be eingschränkt well as zBbei note some large American corporations that introduce eurpaweit new guidelines and not even the actual date of purchase of an item here but the date of purchase of gewernblichen distributor !? So what remains to be extended by additional. Buy insurance, the guarantee to be able to use a device longer! mfg