ITEM NAME:Bike 23 Function Solar Power LCD Back Light YT812B Odometer Speedometer #gib Store Home Promotion Hot Item Add to Fav.Material:ABS,engineering plastics, LCD display, electronic components, etc. Health & Beauty. Tip: magnets installed in the spokes,make the distance of magnets and the sensor is less 5MM. With imported sensors,stable performance, accurate speed and a wide variety of working temperatures ranged from -20℃to 70℃.