【POWERFUL BATTERY】 - 5200mAh built-in high quality and capacity lithium ion battery , 4 hours endurance in highest brightness mode ,Powerful energy guarantees strong brightness. USB rechargeable bike headlight. 【BIKE HEADLIGHT RUNS on BUILT-IN BATTERY USB RECHARGEABLE】- With 2 LEDs headlight built. No wires or external battery accessories needed. Portable, powerful and convenient. 【SOLID MILITARY WATER RESISTANT BIKE LIGHT】- This front bike light made of aviation aluminum alloy, it is strong and shock resistant, reliable and durable bracket perfect works with this bike light, keep your road safety in the nighttime. Waterproof bicycle front light against splashing water from any angle. light your road in all conditions of weather! 【QUICK INSTALL & UNIVERSAL FIT & 360°ADJUST BRACKET】- Easy to install in 5 minutes,no tools required.With our NEW UPGRADE mount,guaranteed to fit ALL bikes,Mountain bikes, kids & road bikes. Widely apply to men, women and children who love riding and outdoor sports: biking,camping,hiking,running,cycling. 【FLAT BEAM SHAPE】 - Bicycle Headlight has ONE OF A KIND flat beam shape - Specially designed for Cyclists riding in urban environments. Feature a one-touch switch: Headlight 5 modes(High, Medium, Low, Strobe1,Strobe2); Drivers of oncoming traffic or other pedestrians will thank you for not blinding them.