GOQii Balance Body Composition Monitor with 3 Months Personal Coaching Subscription comes with a large display led with backlight which provides in-depth measurements of not only your weight but also other key measurements that can aid you in optimum weight management. Bioelectrical impedance analysis (BIA) is a common method used by body composition monitors to calculate body composition. GOQII Balance body composition monitor uses The BIA technology that produces accurate stats via a series of complex algorithms and uses that to calculate the total body water. From the total body water, it can estimate the following body compositions: weight, muscle mass, BMI (Body Mass Index), bone mass, body fat, water content, body score, basal metabolism, and visceral fat.