With this computer, every cycling data is under control. Features: Small size, lightweight and wireless design make it more convenient and easier to install and use. 2.8-inch large screen with LCD backlight allows you to read data clearly at any time and any angle. smart chip, stable performance and large memory capacity, thus data will not lost when is off. Real time recording, current speed, max speed, average speed, distance, total distance, temperature, calorie, stop watch. IPX6 grade waterproof, it can be used on rainy days. Button battery, longer and lower consumption. Specifications: Material: ABS + PMMA Shell Color: Black / White ( optional ) Backlight: Blue / Green / White ( optional ) Screen Size: 60 * 45 mm / 2.4 * 1.8 in Product Size: 80 * 54.5 mm / 3.1 * 2.1 in Product Weight: 65 g / 2.3 Packing Size: 13 * 8 *4.4 cm / 5.1 * 3.1 * 1.7 in Packing Weight: 150 g / 5.3 Package List: 1 * Bike Computer 1 * Extension Bracket 1 * Nut 1 * Base 1 * 1 * Magnetic Screw 4 * Zip Ties 1 * Rubber Pad 2 * Manual