Glass Bathroom Scale with Body Fat Monitor is an elegant, smartly designed accurate body fat scale. It calculates your body fat percentage of the total weight. Bioelectric Impedance Analysis technology is used to precisely and promptly display weight, body fat and water percentage. Electrodes, placed in the foot sensor pads, send a signal through the body. Glass Bathroom Scale with Body Fat Monitor measures the impedance or resistance to the electric signal as it goes through water found in muscle and fat.