Features:- Smart G-type manganese steel sensor senses the slight weight change of the body up to 50g.- Slim, rounded exquisite curve, conveniently placed anywhere.- Invisible LED display, presenting your weight precisely- BT 5.0 technology with low consumption, support 16 persons data memory- 13 items of body tested precisely, including weight, BIA, fat rates and more- Body balance tested for get a less risk of joint injured.- Mi Fit APP, get all your health detailed data.Body Mass Index (BMI)BMI stands for Body Mass Index and is closely related to body fat percentage.It takes into account both height and weight, which is a more reliable guide in determiningwhether someone is underweight or obese than simple body weight. It is a better predictorof risks such as heart disease and high blood pressure. (Requires Mi Fit app.)