Three Easy Steps to Improve Your Health All-In-One. Improve Your Health! Easy to Use! Heart Rate Monitor, Step Counter & Watch. Improve Your Health. Lose Weight. Reduce Stress on Your Heart. Heart Rate Monitor. Step Counter Digital Watch. Lower Blood Pressure. Bonus: Walking and Exercise Guide. No Chest Strap Required "It s as easy as walking!" The watch uses one standard lithium replacement battery: CR2032.