Countdown time up to 60 minutes with the twist of a dial, doesn’t require any batteries, and easy to use: rotate the timer hand clockwise above the “55” scale (Do not exceed the “0” scale), then rotate counterclockwise to the countdown time you need to set. With powerful magnets that can easily and firmly stick on the metal surfaces, such as refrigerators, ovens, roasters, etc. Also ideal to place on classroom whiteboards and more. Suitable for anyone, it can be used for cooking soups, stews, decocting herbs, instant noodles, etc. It can also be used for naps, exercise, skincare, learning to do homework, or for any purpose.