Nice design she has, but unfortunately this bicycle lamp is not working well: With Hubbeln or high sidewalks, the magnet is not strong enough, and the light is just starting. And also slipped again unfavorable, so you have to constantly readjust. After three falls the designer part will look totally battered, the fourth fall was final. Ausgeglühlt. You ought to know but the good old fixed bicycle light dynamo or one that you can really fix. Smart design is not everything when it does not work, it's a hassle-light! And overpriced! Peter Wilke