SE7EN Car Motorcycle Cycling Bike Bicycle Tire Wheel Valve 16 LED Flash Spoke Light 1 auto-sensing switch control, and dynamic light perception of double light switch only at night, indoor, low light and the car will move off the dual case. 2. Waterproof grade: IP55 3 7-color light from the 16 double-sided LED, mounted on the bicycle on the wire, installation is simple, there are 32 kinds of changes in patterns. 4 for 20-inch and 20 inch and above all the bikes, including disc brakes and ordinary V-brake. Please note that bike itself, the length of the wire radius, as long as greater than or equal 14CM like installed. Clamp and housing are PC. PC is a very strong material toughness! 5 DIY program