BicycleStore 36 LED Lights 32 Changes Mountain Cycling Bike Tire Wheel Light Double-sided Full Screen Display High-performance embedded ARM processor and position-sensing switch control 3-color light ( Red,Blue and Green) from the 36 double-sided LED, mounted on the bicycle on the wire, .It is super bright, lower energy consumption and simple installtion.100% waterproof, durable and flexible For 24-inch and more than 24 inch and above all the bikes, please note that bike itself Working electric current : 20 mA ,Voltage range: 3.3V-5.5V,Power by: 3 X AAA Battery (NOT INCLUDED) Speed problems: speed requirement is between 10 and 15 km/h out of the whole map.Up to 10 km/h being very beautiful