What should I say ?! The timer does what he should. Namely measure time, almost like a stopwatch that runs backwards. I use the part in the kitchen. It has a very strong magnet with which I attach it to my refrigerator. Minutes and seconds can be set via separate keys and the display is large enough. But what has prompted me to deduct a star, is the volume of the tone after the time has expired. The fact is something of quiet that it's a joke. You have to listen closely least back! Here, the manufacturer would have to work again after. Otherwise, however, the timer works very well! A battery is also included.