This product is ideal assistant for bicycle training. It's multifunctional, including total mileage, single mileage, maximum speed, average speed, cycling time, temperature, stopwatch, calorie, fat consumption, estimated arrival time, cycle display, time display. Features: Bicycle odometer with LCD backlight. Portable, durable and convenient. Easy to read LCD display with large screen. Easy to control, ideal companion for your bicycle. Easy to install firmly with mounting accessories. Perfect to use when hiking, climbing, riding and other outdoor actives. Ideal assistant for bicycle training. Time display function, also can be used as a wonderful gadget for traveling. Multifunctional: Total mileage, single mileage, maximum speed, average speed, cycling time, temperature, stopwatch, calorie, fat consumption, estimated arrival time, cycle display, time display. Specifications: Body color: black Backlight: blue light, greenlight, white light(optional) Screen size: 2.8 inch Power supply: CR2023 battery, 3V 210mAh (included) Item size: 80 * 54 * 18.6mm / 3.1 * 2.1 * 0.7in Item weight: 130g / 4.6ounce Package size: 158 * 82 * 43mm / 6.2 * 3.2 * 1.7in Package weight: 150g / 5.3ounce Package List: 1 * Odometer 1 * Bracket 1 * Instruction Manual 1 * Transmitter