The Body Fat Monitor will calculate your body fat & your skeletal muscle. It will also give you a reading of your visceral body fat, which is a better indicator of your health risk associated with body fat. Using these calculations and the user-defined height, weight, and age data that you enter, the Body Fat Monitor will give you your resting metabolic energy needs for the day and offer you an idea of how much you should be eating to lose weight in a healthy manner.