TrustFire Super Bright 3 X CREE XM-L T6 4 Modes 3800 lumensWhite LED Bike Lamp, Cree LED Solid Bicycle Light and Powerful Bike Light Lamp with 8.4V 6400mAh Battery Pack and US Plug Charger Set For Outdoor Hiking, Riding, Camping and Other Activites T6 LED bulb provides condensed light and long exposure distance. Applies the high efficient booster circuit to the internal wiring. Can utilize the batteries to a maximum extent. Intelligent circuit control, 4 switch modes, 3800 lumens brightness. Perfect item for your traveling, it has the waterproof function.