The MZ-3 is the most relevant and versatile heart rate fitness tracker on the market The MZ-3 is the most relevant and versatile heart rate fitness tracker on the market, using Bluetooth, ANT+ and Analog technology to provide real-time feedback on heart rate, calories, and effort, to ensure that you get accurate feedback on all your exercise, wherever and however you choose to train. The MZ-3’s inbuilt memory means you can make every session count even when you’re training away from your gym and it’s not convenient to carry your smartphone. Achieve your health and fitness goals with motivational support from friends through the Myzone social network and use our unique Myzone Effort Points (MEPs) system to give yourself the credit you deserve and make your EFFORT REWARDED.