These LED Bike Wheel Lights fits most bicycles, motorcycles and cars. LED Bike Wheel Light features motion sensors, LEDs and replaceable batteries. LED lights will turn on when the vehicle is moving and off when the vehicle comes to a stop. Screws onto the valve stem of your car, bicycle or motorcycle in seconds. 100% waterproof Requires 6pcs 1.5V AG10 batteries (included) Enhances safety by increasing visibility at night and during bad weather conditions. Easy to install and remove.