DSS Cycle Wheel Valve Cap Cycle Tyre Light LED Wheel Reflectors  (Green)

1. These LED Bike Wheel Lights are easy to install and remove; they fit most bicycles, motorcycles and cars. 2. LED Bike Wheel Light features motion sensors, LEDs and replaceable batteries. Batteries: Requires 3 x AG10 button batteries per light (included) 3. The light will be off when the vehicle stops, on when it runs, and flash when you’re driving at night. 4. Screws onto the valve stem of your car, bicycle or motorcycle in seconds. 5. 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.