It's no longer enough to train hard, you have to train smart if you want the edge. The Timex Ironman Race Trainer Digital Heart Rate System provides elite athletes the necessary performance measurement data to succeed. With a 10-workout memory, 50-lap chrono with average heart rate per lap, and five interval timers with individual heart rate target zones, the Race Trainer System makes serious training seriously easy. The wireless Data Xchanger USB included in the Race Trainer Kit adds even more functionality to the system. Users can customize HRM and watch settings, upload workouts directly to their PC and training and nutrition software powered by TrainingPeaks.