Displays heart rate data from your MZ-3 Physical Activity Belt. Pair the MZ-60 watch with your MZ-3 belt and see your heart rate, intensity level, MEPs (Myzone Effort Points) and calories without interrupting your flow. With a built in stop-watch and timer, the MZ-60 is the perfect training partner to your MZ-3 or MZ-Switch. 100% motivation guaranteed. Don't forget to belt up before you go - the MZ-60 watch won't pick up your heart rate without one.