TYRE WHEEL VALVE LED FLASH SENSOR CAPS

Features Works with all cars and bikes  More energy-efficient with light & motion sensors  Auto shining, No switch, 100 percent  waterproof  Batteries  Requires 3 x AG10 button batteries per light  included Please 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.