The Garmin® Edge 305 GPS-enabled, personal trainer and cycle computer keeps track of speed, distance, cadence, heart rate, lap by position, elevation, average and max speed, calories burned, climb, and descent. The inlcuded heart rate monitor and/or wireless speed/pedaling cadence sensor provides valuable feedback for cycling workouts. A barometric altimeter gives you extremely accurate elevation and vertical profile data.
By Patrick Gfrom Cape Town South Africa on 2/21/2007
The biggest flaw of the Edge 305 is the calories expended. It is not based on HR (in fact you get a calorie reading without having the HR strap on). It is calculated purely on speed and distance.