The FitScan BF-679F Body Fat / Body Water Monitor features weight, body fat %, and body water %, with a two-person memory and athlete mode. It provides greater control over monitoring and improving health and fitness, as well as, essential information for you to use while setting goals, for staying healthy and living a more active, vital life. This monitor calculates body fat and body water levels using bioelectric impedance analysis (BIA); sending a safe, low-level electrical signal through the body. Body fat monitoring using the BF-679F is an essential tool for precisely measuring your body's inner health. Maintaining healthy body fat levels has far more value than simply calculating your body mass index (BMI). Proper hydration is essential for life. Maintaining a healthy body water % improves overall health, keeps you feeling energized and operating at a peak performance. Average range for a healthy adult female is 45 - 60% and for a male 50% - 65%. The BF-679F features a weight capacity of 300 pounds, it operates for greater than 2 years on four AA batteries (included). **FITSCAN SERIES BY TANITA ARE MANUFACTURED EXCLUSIVELY FOR NORTH AND SOUTH AMERICA. FITSCAN SERIES IS IDENTIFIED BY THE (F) AT THE END OF THE MODEL NUMBERS, MODELS WITHOUT THE (F) ARE MANUFACTURED FOR DIFFERENT PARTS OF THE WORLD. THE FITSCAN SERIES OF TANITA BODY COMPOSITION MONITORS INCLUDE GRAVITATIONAL ALGORITHM CORRECTION FOR THE AMERICAS. MODELS FROM EUROPE OR ASIA DO NOT HAVE THE SAME ACCURACY AS THE FITSCAN SERIES FOR CONSUMERS USING THESE SCALES IN THE AMERICAS.