Tanita's TBF-300GS utilizes patented "foot-to-foot" BIA technology to make determining internal body composition a fast and accurate procedure. Features include 440 lb. x .2 lb. scale capacity, Adult, Child, and Athletic modes, "weight only" function, fast thermal printer, and RS-232 port for computer interface. Lightweight, portable model prints out Fat Mass, Fat Free Mass, Fat%, Total Body Water, BMR and Desirable Ranges automatically, with up to 9 copies. Tanita's body composition analyzers are used independently or they can be interfaced with a Computer running Tanita's Health Management Software.