This GoWISE USA GW22027 Body Fat scale measures four components of the body: body fat, body water, bone, and muscle mass. It is equipped with four high precision sensors on a tempered glass platform. This scale uses a measurement method called Bioelectrical Impedance Analysis (BIA). This type of technology uses a minute electrical current and passes it through the body to make estimate measurements of each component. This Digital Glass body scale has an Auto-On function, LCD backlight, a touch switch, a slim design with a special hanging hole design, a weight capacity of 400 lbs., and an athlete mode.