Lightweight GPS-based cycling computer tracks your distance, speed, location and elevation with high-sensitivity GPS * Barometric altimeter pinpoints changes in elevation for extra-precise climb and descent data * Work with third-party ANT+-enabled power meters to display your power output in watts as you ride * Use with optional heart rate monitor to hit your targets, track calories burned, and more * Join a worldwide network of cyclists through Garmin Connect, a one-stop site for data analysis and sharing