Features: High Efficiency sensors Activation Specially magnets head ensures accurate speed and distances trackings by triggering sensors from extended ranges, enhancing cycling data precisions. Durability metal construction with a powerful magnets guarantees reliability and resistance to wear, for long terms performances in demanding conditions. Ideal for commuters, fitness enthusiasts, and road cyclists seeking precise cycling metric without compromising wheel aesthetic or functionality. Perfect for commutes, or indoor training setups, seamlessly integrating with bike computers to monitor performances in real time. Compacts design and universal compatibility with 2mm spokes ensure effortlessly installation across road, and hybrids bikes. Specifications: Dimension:15x12mm/0.59×0.47in Component:Metal + Magnets Package Includes: 1pc Bicycles code magnets note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.