DuaFire Super Bright Bike Light,Cree T6 Flashing Waterproof Bicycle Headlight,LED Front Light Accessories for Cycling 2 in 1 functions: Bicycle LED light and Head Helmet LED Light. The bike headlamp with adjustable headband, rubber ring for installation 3 modes: High = 1200 Lumens, Medium = 600 Lumens, flash=300lumens. More condensed light, long exposure distance Waterproof design (IP-65), but don't put it into water directly Great for cycling, riding, hiking, backpacking, camping and other night outdoor activities Note: It not included battery