Even though it feels like you're struggling, a quick glance down at the M1 Heart Rate Monitor says you've barely gotten out of the unconscious zone. This standard heart rate belt transmits information to the round faced watch that is uncluttered and easy to read so you can figure out when you're hitting your target zones and workout more effectively. Three different heart rate zones help you reach specific fitness goals and offer some feedback for more efficient workouts. When you input your information, this lightweight watch will calculate real time calorie consumption. Store up to 4 weeks of data if you don't like dealing with a daily exercise log. Even when you're not hammering out an exercise regiment, this round watch tells time, speaks 9 different languages, and looks good with outfits that are completely free of spandex.