1. 19 functions, accurate riding: This bicycle odometer measures speed, distance, riding time, calories burned, and more. It helps adjust speed to meet cycling goals and optimize exercise effectiveness. The bicycle speedometer features a high-performance sensor and strong magnet for stable, interference-free operation and precise data tracking. 2. Large backlit screen for easy reading: The bicycle speedometer has a 2.2-inch display with three rows of data. Large, clear digits ensure readability from multiple angles. The top row shows current speed, the middle row displays temperature, and the bottom row can be customized to show other metrics. The backlight is easily toggled on or off for clear visibility in all lighting conditions. 3. IPX5 waterproof rating: Designed to withstand rain and splashing water, this bicycle computer is suitable for use in varied weather conditions during medium- to long-distance rides. The soft green backlight reduces eye strain and enhances nighttime readability. 4. Automatic wake-up function: After 3 minutes of inactivity, the display enters sleep mode. Pressing any button or rotating the wheel automatically wakes the device. Energy-efficient design eliminates the need to manually power off after each ride. Lightweight and weather-resistant, it fits most bicycle types and performs reliably year-round. 5. Installation: The package includes a magnetic ring, sensor, mounting bracket, and display unit. The magnet attaches to a spoke, the sensor mounts to the fork, and the display installs on the handlebar using the included bracket. A Phillips screwdriver is required for secure magnet installation.