Very disappointed in this product that was used 5 times and is already HS. In fact, he did more off and the entire screen is on. It can be paid nothing (guitar, violin etc.), nothing to any buttons, it stays on ad vitam. To turn it off I have to remove the battery. And when I put it back, but it seems to start directly all is bright again. In short, it is permanently on, he no longer gives a very bad product I do not recommend !!!