Want to add some cool style to your car's wheels? These red LED valve stem caps light up when your wheels are moving! You get 4 pieces (one for each tire), brand new and unused. The color is bright red, and they feature LED lighting technology that activates automatically when the car moves (centrifugal force turns them on). They're waterproof and have easy installation - just screw them onto your existing valve stems like regular caps. Universal fitment means they work on most cars, trucks, motorcycles, or bicycles with standard valve stems. Made in China, unbranded but functional. The bulb color is red (matches the cap color). No complicated wiring or batteries needed - the motion powers them. Perfect for car enthusiasts, tuners, or anyone who wants their ride to stand out at night. They add a subtle but cool glow to your wheels when driving. Much more interesting than plain black plastic caps. Just be aware they're for style, not for tire pressure monitoring. Give your vehicle some personality with these affordable, eye-catching valve stem caps.