The "RAINBOW" LED wheel valve cap light set (2 pcs) is designed for installation on Schrader/Auto Valve (AV) stems. Each light features 5 LEDs emitting yellow, blue, and red light across 7 distinct flashing modes to improve cyclist visibility and night safety. The package includes 6x AG13 batteries (3 per valve cap light), making it ready for immediate use out of the box. A bright, decorative accessory for bicycles and vehicles with standard auto valves.