Lighscastle Hot Wheels Bicycle Wheel LED Spoke Light IP6 Waterpoof 14 Full Color LED for Night Riding with 30 Patterns Transform Safely for Night Riding: It create a very highlighted appearance from all angles raising driver's awareness of you, patterns are cool and people surely turn their head to look at you. 14 Full Color LEDs, 30 patterns Transform, every 4 seconds per Pattern. Easy to Set up: It needs a Single AAA Battery(Not Include )Only to turn it off and on you simply put the battery in and screw the cover on and that turns it on. Sensor Switch: Equipped with lighting sensor and Dynamic sensor flash only at night and action together. Save power, and don't need to Take out of the Battery for turn off the light. COOL-CYCLING: Extremely bright, Eye-Catching, Flash 30 kinds of pattern changing one by one each 4 second. Waterproof: IP6 Waterproof, you won't worry riding in the rain, but don't soaked it in water. Suitable for Mountain Bike,Road Bike,Ordinary Bike, Kids and Adult bike also be suit.