Garmin Edge 305 Bicycle GPS Navigator with Heart Rate Monitor and Speed Cadence Sensor Rugged, lightweight Edge attaches easily to the stem or handlebars of your bike with the included bike mount. Just turn it on, acquire GPS satellites and go. Edge 305 automatically measures your speed, distance, time, calories burned, altitude, climb and descent, and records... 

Polar RS800G3 Bundle Includes S3 Stride Sensor G3 GPS Sensor Free IRDA “The RS800G3 was designed for multisport athletes who want to use GPS technology to measure speed and distance across all terrains. It features the new G3 GPS Sensor, a lightweight, water resistant device designed to withstand the harshest conditions and handle the most extreme...