Simply Silver - New Bike Bicycle Waterproof Lamp Front 5 LED Head Light + Rear Safety Flashlight - Unbranded 5 LED ultra bright white light 2 modes: steady and flash, switch between 2 modes by pressing the button on the top of the light Features a quick release bracket, very easy to install Powered by 4 x AAA batteries (Battery NOT Included) Size (Length Width x Thickness): 97 x 65 x 33 mm / 3.82 x 2.56 x 1.30 inch