The perfect starter pack for adding a light to any helmet or curved surface. Tired of blinding your other riders with your helmet light? Simply adjust the angle of the SL-200 with Dual Lock velcro by 3M. Years of research and development have brought this perfect combination of reliability and ease of use to a helmet near you. Now with a 3x bigger battery for up to 150 hours of battery life and 200 lumens of maximum brightness per ShredLight.