This specially-designed, deluxe digital scale displays your weight, body fat, muscle mass, hydration level and bone mass. It features "step on" technology that gives you instant readings on an easy-to-read jumbo display, and has high precision sensors for accuracy. The tempered glass design supports up to 400-lbs. Req. 2 "AA" batteries (sold separately). Glass and metal. Measures 13 1/2"Sq. x 2"H. The use of this scale is not recommended for persons with an electric implant/pacemaker.