Specification: 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 don39;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 don39;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: ①Actual color may be slightly different from the image due to different monitor and light effect ②Please allow 1-3cm deviation due to manual measurement Description: Battery:3xAAA Batterynot included Size:16.5x4cm Package List: 1/2x 3D Bicycle Spoke LED Lights