Description: 【Compact and Lightweight Design】: This Bike Computer is designed with a compact structure, making it easy to install and carry during your cycling adventures 【Waterproof Construction】: With an IP67 waterproof rating, this Cycling Computer is built to withstand rainy conditions, allowing you to ride confidently without worrying about water damage 【User friendly Installation and Operation】: The Bike Speedometer features a simple installation process where the magnetic head should be within 5mm of the sensor for accurate reading. It also includes a large digital display for easy reading 【Intelligent Power Saving Features】: To maximize battery life, this bike computer automatically enters power saving mode when not in use and can switch to sleep mode as needed, enhancing its overall efficiency and longevity 【High Performance】: Equipped with a large capacity battery, this Odometer offers approximately 6 months of continuous use, ensuring you have reliable power for extended biking trips Specification: Material: PVC Size: Outder Diameter 5.6cm/2.20inch, Inner Diameter 4.5cm/1.77inch, Thickness 2cm/0.79inch Package Includes: 1 Set Bike Computers Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.