Fanmis Wireless Waterproof Backlight LCD Bike Computer Bicycle Speedometer Odometer Multi Function Modern-day, cutting edge wireless bicycle computer complete with an easy-to-read LCD display. The large LCD display guarantees you can read your statistics easily, even while riding and the numbers are large so there will be no squinting or leaning down to read. Small size, light weight, multi-function:Functions as a bicycle speedometer AND odometer, measuring both speed ,distance, and riding time, three numbers which no serious bicyclist or fitness fanatic wants to go without knowing. Wireless and waterproof design makes it more convenient and durable. Long gone are the days of a bunch of ugly, tangled wires on your handlebars, and no need to worry about rain. The backlight can be set in either green and white color. Please note the slight rattle sound from device is normal phenomenon, which results from the design of wireless automatic function Suitable to all types of bicycles: road cycling, mountain biking, folding bike, common bicycle.Perfect device can also be used for hiking, climbing, and many other fun, adventurous outdoor activities.