G-shaped sensor. Able to sense weight changes as small as 50 g. High-precision BIA chip. Measures body fat percentage easily. 13 body composition metrics. Understand your physical condition. Balance test. Stand on one foot with your eyes closed. We normally use body weight as the sole measure for determining whether someone is over or underweight, but this is not accurate. Because fat takes up three times the space of muscle, people with too much fat will look more obviously overweight. Therefore, body fat percentage is the measure for determining whether someone is over or underweight. A precise, comprehensive body fat scale can also help you to understand your body better.