Instructions for use: Turn the timer clockwise one turn to zero scale, then counterclockwise back to the desired time, the timer will then sound a crisp bell. Features: ribs to be cooked for half an hour, crabs to be steamed for ten minutes, milk five minutes on the splits, when you are busy in the kitchen, if you can always remind you how good it is when the time is up. These small timers can help you, you no longer have to worry about the water boiling dry, the vegetables burned. A half-hour nap is enough, hair baking 20 minutes, children set half an hour to complete a set of math exercises, 20 minutes to memorize English words, morning exercise at least half an hour ...... Product description: 1, mechanical timer, using special mechanical customization, the principle of the same mechanical watch; 2, 1 minute - 60 minutes arbitrary adjustment; 3, beautifully shaped, is a very lovely home decorations Oh; 4, wide range of applications: medicine, kitchen, home, school industrial and mining, nursing, etc. Cautions. 1, rotate to the end, please do not force too hard, so as not to damage the built-in movement; 2, timer work, please do not repeat the rotation back and forth several times, so as not to damage the built-in movement; 3, the timer shell is made of ABS plastic, please do not throw, throw, smash, etc. easy to break the timer shell; 4, timer shell, built-in movement are plastic, please do not use fire, burn, etc..