Baiyu Bike Bicycle Spoke Lights Waterproof 2 Modes Cycling Wheel Tire Lights Steel Wire rim 20 LED Flash Light Led light is folding resistance and bending resistance,waterproof Waterproof, durable and flexible. 2 lighting mode - constant light mode and flashing mode Easy installation, it can be fixed on cycle spoke or cycle frame High-brightness LED, it can make you a beautiful and safe riding at night Powered by : 3pcs AA batteries (not included),Only one is included. Please purchase two if need for two wheels of your bike