Ugears - Timer (20 minutes) - Medium LevelOne of UGEARS more beautiful (and functional!) models, our Timer is a top of the range model. It can be set for any duration between 1 and 20 minutes. The Timer has a working wind up alarm mechanism that will be set off when time runs out. Once built, the Timer has a unique roller pendulum and amplitude adjustment system on its back wall. The same as other UGEARS models, the Timer works thanks to a rubber band motor. Redesigned and rebuilt many times