Wireless Bike Computer Bicycle Speedometer Waterproof Cycle Computer with Speed Sensor LED Backlight Automatic Wake-up Features: Wireless Cycle computer that can display rich data during training, such as mileage, speed, temperature, stopwatch, calories, time, etc. 2.7-inch high clear digital screen, large font display, easy to view. With LED backlight, it is clear even at night or in low light. Built-in button battery, supports automatic sleep when parking and automatic wake-up when riding, saves energy and prolongs battery working time. High-quality ABS material, with nice durability, strong and high temperature resistant. Waterproof design, can be used normally even on rainy days. Easy to install, wireless design saves time and effort. It comes with a mounting bracket to make the angle more comfortable and improve riding safety. Specifications: Color: Black/ White+Red/ Black+Red(optional) Material: ABS Screen: 2.7 Inch Battery: 1 * CR2032(3V/240mAh) IP Rate: IPX4 Item Size: 78 * 53 * 18mm/ 3.1 * 2.1 * 0.7in Item Weight: 51g/ 1.8oz Package Size: 158 * 82 * 43mm/ 6.2 * 3.2 * 1.7in Package Weight: 145g/ 5.1oz Packing List: 1 * Bike Computer 1 * Wireless Transmitters 1 * Base Bracket 1 * Extension Bracket 1 * Extension Bracket Plastics Nut 1 * Base Bracket Gasket 1 * Transmitters Adhesive 1 * Magnets 4 * Nylon Cable Ties 1 * Manual 1 * Installation Guide