Clear Display: High resolution, backlit display is easy to read in both bright sunlight and low light conditions. Use the button to scroll through different functions. High-precision Data: Advanced programming and optimized chip technology provide reliable speed (SPD), distance (ODO, DST), time, and other metrics with every ride. Automatic Function: When powered on and you begin riding (after moving forward 5 meters without pressing any buttons), the bicycle computer automatically wakes up wirelessly and retains previously recorded data. Low Battery Reminder: When the sensor or bicycle computer battery voltage drops below 2.5V, a low battery indicator appears to prevent unexpected shutdown. Simply replace the battery to resume operation. Includes Battery and Installation Instructions: The package includes a detailed English user manual, CR2032 battery, and all necessary accessories for quick and easy setup. Note: This bicycle computer is not designed for use with electric bicycles. Color: As shown Material: ABS Size: 5.6 x 4.1 x 2 cm Package Contents: 1 x Cycling Computer 1 x Wireless Sensor 1 x Mounting Bracket 4 x Plastic Tie-Wraps 1 x Elastic Band 1 x CR2032 Battery 1 x 23A Battery 1 x Magnet 1 x English User Manual Contents are limited to the above list; other items are not included. Note: Lighting effects and screen differences may cause slight color variations between the product image and actual item. Measurement error allowance: +/- 1-3 cm.