Fun handwashing with music for 30 seconds! Reacts with a non-contact sensor when you hold your hand up. Clean, without touching. Splash-proof. For virus protection. Approximately 30 seconds x 10 songs Random playback Can be used when you want to measure 30 seconds! I think it will also be useful for muscle training such as sit-ups and squats, as well as for loose jumps and brushing your teeth. #loose jump #timer #muscle training #teeth brushing #diet