Feature Tire valve cap lights screw onto the valve stem of your bicycles in seconds. Universal fitment and easy to install no special wires, can be easily installed and removed. Silver body with ultra bright, long life-span led lights. Waterproof, shockproof. Power by 3 x AG10 batteries. (without the battery) Package Include 1 pcs Wheel LED Light Note: Battery is not included NO Retail Box. Packed Safely in Bubble Bag.