Sorive&reg; Pack of 20 Led Flash Tyre Wheel Valve Cap Light For Car Bike Bicycle Motorbicycle Wheel Light Tire (Red, Yellow, Blue, Green, Colorful) Package included: 10 packs LED Valve Bike Lights: 4 x Red, 4 x Yellow, 4 x Blue, 4 x Green, 4 x Colorful More energy-efficient with light & motion sensors Auto shining, No switch, 100% waterproof, fits for Presta & Schrader valve. Please kindly note there is a piece of paper in the battery case that needs to be removed before use. Sometimes it still not work when you remove the paper, then you need to put them on the valve stem and ride, they will light up. Batteries: Requires 3 x AG10 button batteries per light (included)