this thing began to ring once - a howl - at 1:30 am, terrible awakening! I thought the battery was dead, she was (Duracell, thank you) I exchange with another brand, two weeks later, today, the same picture, the machine starts to yell for no reason. Never again in my house! should not it be smart to buy management: recycling this type of gadget made in china that should be given with a hamburger saw reliability, I owe two holes in the wall, spackling, and 30 euros disappeared overnight so to speak :) I especially brackish that I bought two (one is still packed), unable to return the (timer expired) and powerless get rid of the impression of having been slightly pigeon this purchase