Cateye have created an affordable wireless cycle computer capable of processing speed, distance, heart rate and cadence information using cross talk free 2.4GHZ digital wireless technology.
Measuring your current/average/maximum heart rate and cadence plus calorie expenditure the V3 clearly displays 4 readouts simultaneously.
Additional features include a 99 lap counter, data review and countdown distance functions, automatic 2nd bike recognition and a backlight. It really doesn't get any better than this.