VOLADOR Bike Light Set, Bike Headlight USB Rechargeable, LED Bike Front Light & Taillight, Water Resistant Cycling Light for Street/Mountain/ Kids Bikes WIDE ANGLE BEAM: Special designed cambered beam will produce wide and flat lights (300 lumens)instead of round beam, gives you a wider view without wasting energy and wont blinding oncoming pedestrians and riders. USB RECHARGEABLE & LONG RUNTIME: With built-in 3.7V 800mAh Li-poly battery, it can be charged with power bank, computer and any other USB charging devices. you can get run time of 3hrs on high, 5 hrs on medium and 12 hrs on strobe mode after 3 hrs charging time. EASY INSTALLATION & QUICK RELEASE: No tools required, easily attaches this bike headlight to handlebar in seconds. Also it can be detaches from bracket easily so you can take the light off when you leave bike outside. VERSTILE BIKE LIGHT: The cycling headlight is perfect for commuting, mountain biking, road cycling, trail riding, helmet mounting and other outdoor sports. Fits most bike handlebars from 20 to 40mm in diameter. RISK FREE PURCHASE: Every bike headlight is offered 30 days Money Back Guarantee and One Year Quality Warranty. If youre not satisfied with VOLADOR bike front light for any reason, Please contact us at any time and we will take care your issues.