Pellor Waterproof Shockproof 5 LED 7 Mode Cycling Bike Motor Car Tire Spoke Valve Wheel Cap Alarm LED Neon Light Lamp 7 LED twinkling modes and waterproof & shockproof Fits for most valves of road and mountain bikcycles, motocycles, cars Turn on/off the bright colorfull twinkling LED by manual switch Enhances safety by increasing visibility at night and during bad weather conditions Requires 3 x AG10 batteries (pre-installed)