The adidas miCoach Pacer Bundle will revolutionize your run. Every runner is different, and every heart is unique. miCoach takes the guesswork out of interval training by using the heart rate monitor to simplify the science of running so you can reach your goal and see results. With 98% accuracy out of the box, the stride sensor tracks your pace, distance and stride rate and relays each back to you through real-time audible coaching. The Pacer interacts with the stride sensor and heart rate monitor to tell you what you need by using color zones. Push on it at any time to hear real-time audible reports on pace, distance, time, heart rate and calories burned. It works great by itself, or if you prefer music, it's compatible with nearly every mp3 player. Get all three components in the conveniently packaged adidas miCoach Pacer Bundle.