Easy to install : Simply screw it onto the tyre valve. Twist off your original valve cap, and replace with this valve cap LED light. Installs on standard tyre air valve of cars, motorcycles or bicycles
No battery connection required – No need to connect to the vehicle’s battery.It lights up itself using high-quality metal gold-plated, inner zone button batteries. Requires 3 AG10 button cells per skull valve.
Light Sensor to ensure that the light does not switch on during the daytime.