Feature: 1. Function: This bicycle odometer is good for measuring speed, distance, riding time, calorie count, etc. It helps to adjust the speed, finish the riding plan on time, adjust the riding pace and achieve better exercise. 2. Excellent Features: The numbers of the bike computer are large and clear, so that you can easily read the data from all angles. Easy to open and close, simple to operate. 3. Waterproof Performance: The cycling computer is waterproof, ideal for cyclists on long trips, which can resist harsh environments and bring you a good riding experience. 4. Versatile Design: The bike odometer is energy efficient and convenient to use, light weight and wired design makes it suitable for most types of bikes and any season. 5. Tight Installation: Bicycle speedometer base slot firmly lock the speedometer body, not afraid of falling, magnet design without tools to install, making the ride safer. Specification: Item Type: Bicycle SpeedometerMaterial: Acrylic and ABSBattery Type: Button cellx1 . Package List: 1 x Bicycle Speedometer1 x Bracket1 x Magnet 1 x Tie 1 x English User Manual