For now, the device is working properly (it is true that I am still not used) but luckily I was able through your customer service end up getting a leaflet in French (I do not understand German ) because I could not have known that the duration of use was 2 minutes maximum, followed by a break of 60 minutes, and I think I could have "grill" the device. You should pay attention to the notices and instructions and require your foreign suppliers to join a notice at least in English and French to their material.