Description Product description: Material: plastic Color red Size: 7.2 * 5.5cm Power supply mode: electronic battery 1. The mechanical timer is adjusted using special machines, and the principle is the same as that of a mechanical watch; 2. Any adjustment between 1 minute and 60 minutes; 3. Excellent shape, its a very nice interior; 4. Wide range of applications: medicine, kitchen, household, school, mining, nursing, etc. Instructions: Turn the timer clockwise to the zero mark and then counterclockwise to the desired time, the timer will make a sharp sound. Precautions: 1. Do not use excessive force when turning it to the end to avoid damaging the built-in clockwork; 2. If the timer works, do not repeat the rotation back and forth to avoid damaging the built-in clockwork. 3. The timer tray is made of ABS plastic. Please do not throw, throw or smash the shell, which can easily damage the timer. 4. The timer bowl and built-in clockwork are all made of plastic, please do not use fire for baking or burning.