Sunbeam BFM580KD01 Weight Tracking Body Fat Scale White Sunbeam BFM580KD01 Weight Tracking Body Fat Scale White. 1.0 inch LCD Display. Calculates body fat percent and displays weight and change in weight for a single user. Accurately measures weight up to 330 lbs in 0.2 lb increments. FDA approved BIA, bioelectrical impedance analysis, measures body fat by passing tiny electrical impulses through the body. The electrical current reacts to fat and muscle by measuring resistance to the current. 4 replaceable AA batteries included.