We have gone through two of this sound machine in the last 7 months. Both have stopped working within a couple of months. At first we had to fiddle with the dial to get them to work, but they would shut off at different volumes, and finally they both just died. They aren't expensive, but it's such a waste of plastic and other materials to have such a short lifespan on this product. This time we're going to buy something more expensive and hope it lasts longer. We're using it for our baby, so it's pretty frustrating when it won't work.