• Mechanical timer, customized by special machinery, the principle is the same as mechanical watch, without battery, economical and practical

• Instruction: turn the timer clockwise to zero scale, and then turn it anticlockwise back to the required time. The timer will send out a clear bell at that time

• When rotating to the end, do not use too much force to avoid damaging the built-in movement

• During timer operation, do not rotate back and forth to avoid damaging the built-in movement

• Adjustable from 1 minute to 60 minutes

Specifications: 

• Material: external plastic, internal metal

• Size: 9.3 * 5.2cm

• Weight: 103g

• Battery: no battery required