<br><b>Specification:</b><br> Material:ABS<br> Size of battery box: 65*18*18mm<br> Light String: 2 meters 20 Super-bright LEDs, color of LED include single color(red,green,pink,white,blue,Multicolor) or mix color optional, pulling of the light string from DC plug to change another one if needed.<br> Installation: battery pack is fixed on cycle spoke with two screws while light string in enclosed on spoke tightly.<br> Flash mode: This bike wheel lights has an on and off switch. According to your needs, you can select flashing model or steady model by the switch.<br> Replace the lights with different colors: pulling of the light string from DC plug to change another one if needed.<br> Waterproof: YES<br> Power:3*AA Battery (NOT INCLUDED)<br> Features: High brightness, low energy consumption, light string can be bent freely, it can tied to the spokes easily.<br> <br><b>Package include:</b><br> 1 x SOONDAR Bike Wheel Light<br>