All Sigma heart rate monitors facilitate training in target zones, featuring pulse monitor, 12/24 hour clock, 5-year warranty and are waterproof to 3 meters
PC9 also a Training Manager which monitors, plans and evaluates all workout data for up to 7 workouts, an Exercise Zone feature which calculates ideal personal training limits and 1-3 manually adjustable heart rate limits, 5 languages
PC10.11 functions idectical to PC9, just in a different body
PC15.11 has all PC9 features plus an alarm clock, lap counter and back light
