YDP-SPORT Rechargeable Mountain Bike Light with Warning Blink Waterproof Powered by 4x18650 Battery Pack with Charger 2000 Lumens Ultra Bright Easy Installation for Cycling Flashlight 1. USB RECHARGEABLE WITH LONG RUN TIME: Used Ultra bright Cree XML2 LED Powered by 4 x 18650 Rechargeable battery pack 2000 lumens and fully Charged in 3-4 hours 2.DIFFERENT MODE FOR DIFFERENT REQUIREMENTS Black switch on the right: High-Mid-Low-off, Fast flash via long press Red switch on the left: Ring light - and SOS slow flash- off Key lighting and Auxiliary lighting can work together on the same time 3.WATERPROOF DESIGN Screw thread connector, waterproof design Hollow-carved, multihole,fast heat dissipation, Waterproof,this mountain bike light is no influence used in rainy day 4. COOL RING LIGHT: This Cycling Flashlight with the green ring light, independent switch and strobe mode can as mini night light 30lm brightness for 30 nights. It with high beam900lm high brightness. 5. 100% SATISFACTION GUARANTEE AND SELL ONE SET- Best Bicycle bike set High beam light+4 in 1 battery pack+rubber rings+ charger for Mountain Biking, Camping, Hiking, Running Outdoor Lighting(30 days Money Back Guarantee with 12 months warranty)