Fantasy Life Bike LED Valve Stem Lights - LED Light up Tire Valve Caps - Wheel Light (Colorful Fan Shaped) 4pcs UNIVERSAL: Fits for all kinds of bicycle, electric bicycle, kids' bike, motorbicycle etc. AUTO ON/OFF: Actived by motion sensor, the light color will automatically cycle into red green blue purple white.It will light off in 20 seconds after bike stop. SAFETY: Energy-efficient LED, lights are extra bright. Enhance your personality, Make sure cars can see you when you are riding in dark. FLEXIBLE: Easy to install without any tools, just by hand. 100% Risk free purchase: You will be satisfied or we'll give you your money back.