Specification: Features: 1.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.LED bicycle bike lights made of 14/16 double-sided LED lamp beads, 30 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.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.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.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 ③Asian size is smaller than eu/us/uk size,please compare the detail sizes with yours before purchasing. Description: Material:PC Size:15X3.8X1.5CM Battery:3x AAA batterynot included Package List: 1x 3D Bicycle Spoke LED Lights