The monitors use Bioelectric Impedance Analysis (BIA) to monitor multiple components of overall health. The results are analyzed along with gender, age, height and weight for the most accurate and comprehensive at-home reading ever available. Measurements include Weight, Body Fat %, Body Water %, Basal Metabolic Rate, Metabolic Age, Bone Mass, Muscle Mass, Physique Rating, and exclusive to Tanita Visceral Fat Rating.Tanita Body Composition Segmental Scale BC545 features: The monitors use Bioelectric Impedance Analysis (BIA) to monitor multiple components of overall health. The results are analyzed along with gender, age, height and weight for the most accurate and comprehensive at-home reading ever available. Measurements include Weight, Body Fat %, Body Water %, Basal Metabolic Rate, Metabolic Age, Bone Mass, Muscle Mass, Physique Rating, and exclusive to Tanita Visceral Fat Rating. 8 Electrode segmental BIA technology 3 year graph function Athlete Mode Basal Metabolism Rate Bone Mineral Mass Dual Frequency Technology Guest Mode Healthy Ranges Metabolism Age Muscle Mass Physique Rating Recall Segmental analysis for Body Fat Segmntal analysis for Muscle Mass Visceral Fat RatingHow the BC-545 Works: The use stands on four plates on the platform of the scale and pulls the hand electodes that are conveniently housed in the base useing retractable connecting cables The monitor will then send a safe low signal from the 8 hand and footplate electodes thropugh the body The resistance to the measurment is then fed into research equations to provide accurate and personlaed body composition readings.