RioRand 1800 Lumen 3x CREE XML U2 LED Cycling Bicycle Bike Light Lamp HeadLight Headlamp Black Powered by RioRand Advanced Technology RioRand&reg; 1800 Lumen 3x CREE XML U2 LED Cycling Bicycle Bike Light Lamp HeadLight Headlamp Black Applies the high efficient booster circuit to the internal wiring, can utilize the batteries to a maximum extent. Intelligent circuit control, there are 4 lighting modes for your option. ;Timely battery indicator helps you master battery condition. Two ears of the light is equipped with a cooling device, helpful for the heat dissipation.