Garmin Edge 800 Bicycle Computer

http://www.heartratewatchcompany.com/Garmin-Edge-800-p/garmin-edge-800.htm
The Garmin Edge 800 GPS bicycle computer monitors a bunch of data regarding your ride and allows you to tailor-make up to 3 training pages so you can see the maximum amount of or as little personal data as you want. A altimeter offers very precise climb and descent data and documents temperature variations.