Sylvania FX70 OSRAM LED Adjustable Brightness Bicycle Headlight with Daytime Running Light Versatile Advanced and Manual modes with multiple brightness settings and Daytime Running Light Bright 225-lumen illumination with extremely wide 180-degree beam angle for improved visibility Lithium-ion battery pack conveniently recharges via USB (cord and batteries included) Rainproof and splashproof design Mounting bracket fits 22-35 mm (.86-1.3) handlebars