This rainproof bicycle computer with backlit is a good companion for your riding. Features: Real-time display of the current speed, trip distance, riding time, trip time, calorie consumption, current time and current date. Easy view of maximum speed, average speed, total riding time, total riding distance, current temperature and rotations per minute of the wheel. Night light feature with high-brightness light source for a clear view of all data during your night trip. Length unit options of kilometer / mile. Low battery indicator for you to know the working conditions of the odometer. Bicycle oil / maintenance reminder to secure your bicycle's best performance and service life. Options of 12h / 24h systems, Celsius / Fahrenheit temperature systems and a perpetual calender for you to have your trip in control. A stopwatch for you to check the data in competitions. Speeding reminder for safer cycling. A wide range of use on 4" ~ 40" bicycles / electric bicycles or even motorcycles. Real-time indication of acceleration or deceleration for easy control of your speed. Imported sensors to provide stable performance. Modern looks, rainwater-proof, portable and easy to install. Specifications: Color: Black Material: ABS Power source: CR2032 battery Dimensions: 5.5 * 4.6 * 1.9cm / 2.2 * 1.8 * 0.7in Screen size: 3.2 * 3.2cm / 1.3 * 1.3in Item weight: 30g / 1.05oz Package size: 11.5 * 10.5 * 3cm / 4.5 * 4.1 * 1.2in Package weight: 91g / 3.2oz Package List: 1 * Bicycle Computer 1 * Mounting Shoe 1 * Wheel Magnet 1 * Sensor 1 * Adhesive Tape 1 * Set of Cable Ties 1 * User Manual (English)