Instant purchase OK! ◆ These are very popular air valve cap-type LEDs. ◆ This product incorporates ultra-high-brightness bullet-shaped LEDs. ◆ It is powered by 3 x 1.5V button batteries (LR1130). Furthermore, it is equipped with a light sensor and a vibration sensor, so it only lights up when it's dark and when there is vibration, such as when driving. This energy-saving design also reduces battery consumption. ◆ Simply insert the batteries and replace the valve caps on your original wheels or commercially available aluminum wheels. Easy to install! ◆ Lighting color: Seven colors This product is not yet widely available, so don't miss this opportunity! ◆ Batteries sold separately (The displayed price is for 4 items)