Use Bio-electrical Impedance Analysis (BIA) technology, Wireless digital scale not only shows body weight, but also syncs data to your APP including Body Fat, Water, Muscle Mass, BMI, BMR, Bone Mass, Protein, Skeletal Muscle and other data. It makes you know more data clearly about your body in time and track progress easily on your phone. Auto calibration, high precision sensors measure in increments of 0.2 lb, 0.05 kg with 396lbs, 180kg capacity. 4 high sensitive electrodes.