Quantity: One Piece Color: White on Black High Definition Display: 60mm round screen, wide-angle view with large fonts, data can be read from any angle, no blind spot of reflection, especially in the dark or long tunnel. 24 Functions: Recording distance, maximum speed, average speed, current speed, temperature, calorie counter and other 24 functions. The bike speedometer works with all bicycles, road bikes, mountain bikes, folding bikes, conventional bikes. It can also be used for hiking, climbing and many other fun and adventurous outdoor activities. Waterproof: Made of IPX7 waterproof material, it is waterproof and can be used in rainy days, but we recommend avoiding prolonged exposure to rain or water. Wireless & Memory Function: Wireless design makes it more convenient and durable. After 300 seconds without a signal, the screen goes into sleep mode. Within 2 hours between sleeps, the bike computer automatically wakes up while you ride and displays the previous data. EASY TO USE: The comprehensive manual allows you to quickly set up your bike computer and use all functions with just two buttons. The improved bracket will facilitate a better connection, suitable for all sizes of bike handlebars.Good quality product