Specification:_x000D_Features:_x000D_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._x000D_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 ._x000D_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._x000D_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._x000D_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._x000D_ _x000D_ _x000D_Notice:_x000D_Actual color may be slightly different from the image due to different monitor and light effect_x000D_Please allow 1-3cm deviation due to manual measurement_x000D_Asian size is smaller than eu/us/uk size,please compare the detail sizes with yours before purchasing._x000D_ _x000D_ _x000D_Description:_x000D_Material:PC_x000D_Size:15X3.8X1.5CM_x000D_Battery:3x AAA batterynot includedPackage List:_x000D_1x 3D Bicycle Spoke LED Lights