"ADD EXTRA LIGHTING, SAFETY, AND A HIGH TECH LOOK! BLAZING WHEEL LIGHTS SCREW ONTO THE VALVE STEM, AND REPLACE THE VALVE STEM CAP. EACH WHEEL LIGHT HAS 5 SUPER BRIGHT LED LIGHTS, 3 RED, AND 2 GREEN, WITH 25 DIFFERENT ALTERNATING LIGHT PATTERNS. YOUR WHEELS WILL BECOME A SPINNING SPECTRUM OF COLOR! THEY ONLY WORK AT NIGHT, AND ARE MOTION ACTIVATED, SO THE BATTERIES LAST A LONG TIME. OPERATION IS COMPLETELY AUTOMATIC, SO THERE IS NO WORRY ABOUT HAVING TO TURN THEM ON AND OFF. THE LIGHT ASSEMBLIES ARE LIGHTWEIGHT, AND WILL NOT AFFECT WHEEL BALANCE. SOLD IN PAIRS. EACH WHEEL LIGHT COMES WITH TWO SETS OF BATTERIES. FITS: UNIVERSAL. CATEGORY: CHROME ACCESSORIES."