- Large-screen circular LCD display: 2.3-inch circular LCD display with high-definition wide viewing; easy to read data; new design with a stylish, sturdy, and durable appearance. - LCD backlight: backlight design activated by touch; read data clearly at night; choose the light mode to suit your needs for convenient visibility. - 24-function performance: measures distance, maximum speed, average speed, travel time, calories, temperature, stopwatch, maintenance, and more. The multifunction stopwatch covers almost all riding needs. - Waterproof design: IPX67 waterproof rating protects the bicycle speedometer from rain and weather, ensuring reliable use in any riding condition. Use scenarios: - Daily commuting and fitness rides: track distance, speeds, travel time, and calories; use the stopwatch for interval training. - Night cycling: backlight enables clear data reading in low light; adjustable light modes for visibility. - All-weather trips and longer rides: weather resistance allows continued use during occasional rain and variable conditions without interruption.