The Ozeri Gen II Digital MultiFunction Bathroom Scale features the latest generation of InstaOn sensor technology to display and monitor your body weight, fat and water ratios, all within seconds of stepping onto the scale. This Triple Function Bathroom Scale uses bioelectrical impedance analysis (BIA), incorporating a person's age, height, gender and weight to accurately display results in increments of 0.2 pounds or 0.1 kilograms. Bioelectrical Impedance (BI) is a well established and respected method used to estimate body fat and hydration. Muscles, blood vessels and bones are body tissues with a relative high water content which conducts electricity easily. Body fat is tissue that on the other hand displays much less electric conductivity. With BIA, the Ozeri Scale sends a weak and harmless electrical current through your body to determine the amount of fat tissue. This weak electrical current is imperceptible to the user, and returns back data that is used together with the user provided weight, height, age and gender to instantly calculate body fat and body water ratios. The Ozeri Gen II Digital MultiFunction Bathroom Scale displays results on an easy to read bright 3.5” diagonal LCD screen. It also features built-in memory that can store up to 10 personal profiles each with individual measurements and monitoring so that your family members or friends at the gym can each track their progress. This Ozeri scale uses 4 latest generation G sensors to capture weights up to 440 lbs with industry leading accuracy. It also turns off automatically to conserve battery power, and runs on 2 included Lithium batteries for better performance than AA and AAA designs. Made of impact resistant tempered glass, the Ozeri Gen II Digital MultiFunction Bathroom Scale blends the latest in technology with a fashionable design. Your satisfaction is 100% guaranteed.