Ravemen PR900 900 Lumen 2x LED Road Commuting Bike Light USB Rechargeable w/Remote 2yr Warranty w/US Customer Support Fits 22.2mm to 31.8mm Handlebars ANSI Rated 900 Lumens with DuaLens and HiLo technology 2.5-20 hrs run time, USB Rechargeable, USB phone charger IPX8 Water Proof 2 meters