Features: 1.LIGHT SENSOR & DYNAMIC SENSOR AUTO ON AND OFF ENERGY SAVING: LED bicycle spoke lights Without a button to switch on and off the LED bicycle spoke light only lights up intelligently when the bike is moving at night or in a dark area. 2.32 GORGEOUS PATTERNS CHANGE DESIGN SUPER BRIGHT: LED bicycle bike lights made of 16 double-sided LED lamp beads 32 patterns pattern changes every few seconds. The better working speed was 20 km / h. Different speeds these bike wheel lights have different effect shows . 3.LIFE-PROOF DESIGN :The waterproofness of the bright bike bike light is IP55. When you install these LED bicycle spoke lights you don't have to worry about riding on rainy days either. 4.SECURITY AND EASY INSTALLATION: Lightweight design does not affect driving speed and night driving safety. In addition you don't need any other tools. These bicycle tire lights can be installed safely. Perfect birthday gifts and Christmas presents for your son friends husband sports partner etc. 5.SAVE ENERGY: The wheel lights are controlled by the driving speed. The faster you go the more pictures you get! When the vehicle speed reaches 20 mph the patterns become complete. Notice: Actual color may be slightly different from the image due to different monitor and light effect Please allow 1-3cm deviation due to manual measurement Description: Battery:3xAAA Battery(not included) Size:16.5x4cm includes: 1/2x 3D Bicycle Spoke LED Lights "