Upgraded Bicycle Computer: This wireless bike computer is a versatile tool that tracks calories burned, outdoor temperature, average speed, and more. Featuring a high-quality chip, wireless transmission technology, and a 3-inch large screen for clear visibility of numbers, it's suitable for road bikes, mountain bikes, folding bikes, and regular bikes of any size. 31 Functions & Accuracy: Utilizes upgraded intelligent sensors to ensure accurate cycling data and minimize errors. Measures speed (DST), distance (DST), riding time (TM), calories (CAL), and more, keeping you informed of your current riding status. An essential for any cyclist or fitness enthusiast. IP54 Waterproof: With IP54 waterproof protection (do not submerge in water), this wireless bike speedometer can be used in all weather conditions. Detailed installation instructions are included for easy setup. Please review them before use. Automatic Sleep & Wake-Up: The screen enters sleep mode after approximately 5 minutes of inactivity. It automatically wakes up when any button is pressed or the computer is turned. It powers on automatically, starts recording data, and saves previous values. Easy to Read & Backlight: Large, clear numbers on the bike computer allow for easy data reading from various angles. The wireless odometer screen is equipped with day and night illumination, ensuring clear data display whether cycling during the day or at night. The backlight remains visible even in foggy weather or at night without causing eye strain from excessive brightness. This bicycle computer, with its large 3-inch LCD screen, offers easy data reading and minimizes safety risks while cycling. Equipped with 31 functions and intelligent sensors, it ensures accurate measurement of speed, distance, riding time, calories, and more, making it an essential companion for cyclists and fitness enthusiasts. With IP54 water protection, it's usable in all weather conditions and automatically enters sleep mode when inactive to conserve power. Its easy-to-read numbers and backlight provide clear visibility, day or night. Fluctuations in speed data will not affect the overall performance of the bike computer.