This device mounts to a standard 1" bicycle handlebar, and has a GPS receiver previously only available for automobiles, with integral antenna and a speedometer, that accurately displays your location within 10 meters and your speed on an easy to read LCD. The GPS has 16 channels and can save up to 110 waypoints and 20 trips, and provides latitude, longitude, and altitude; the altitude profile setting allows you to plot the cross-section of a mountain you climbed. The speedometer displays the time, current, maximum, and average speeds, speed comparison with your average speed, and has a trip odometer; a compass ring provides your bearing while riding. The GPS comes in a splashproof casing that is also shatter-resistant. 4 1/4" L x 2 3/4" W x 1 1/4" D. (3/4 lb.)