The product I've been trialling for the last month is the MYZONE MZ-3. First question, what is MYZONE MZ-3? Well, it an accurate exercise tracker that helps you get the most out of your workouts. The MYZONE belt fits comfortably around your chest with the small tracker device around the sternum area. The idea is to wear the belt whenever you do any fitness activity and the belt will track your heart rate during the workout, you can then view live stats or analyse via the MYZONE app after your workout.