1.More energy-efficient with light & motion sensors
2.Auto shining, No switch, 100% waterproof, fits for Presta & Schrader valve.
3.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.
4.Batteries: Requires 3 x AG10 button batteries per light (included)