FEATURES 12 to 200 lumens output Spherical lens delivers a to-see-by beam pattern. Fresnel lenses for secondary LEDs provide wide angle visibility 2.5- to 77-hour runtime Charges in the USB port of any laptop or phone charger in two hours (no extra cables needed) Flexible mounting system works with handlebars from 22.2mm up to 35mm in diameter Six modes including: Steady High (100 lumens), Steady Low (38 lumens), Power Surge (97 lumens), Power Flash (200 lumens), Disco Flash (63 lumens), Eco Flash (12 lumens) Red/Green battery charge level indicator