I’m going to be honest my sister got this and decided not to use it. Pretty much brand new. Get it cheaper than Amazon! - thanks for browsing :) About this item: Dodow is a metronome with a light system that teaches you how to fall asleep naturally, without taking any medicine. Tap the touch-sensitive surface once for the 8-minute mode and twice for the 20-minute mode. At the end of the exercise, Dodow switches itself off. With Dodow, someone who normally takes 60 minutes to fall asleep will take no more than 25 - and will gain around hundred more hours of sleep per year. More than 800,000 people are already falling asleep with Dodow Amongst them, those who have difficulties getting to sleep (aged 6 years and up); troubled thoughts, stress, restlessness, chronic insomnia, etc.