this item Large LCD Screen Display: Instead of normal LCD display scales, the Runstar scale features a large display screen that shows 6 key measurements, including weight, body fat rate, BMI, muscle mass, body water rate and bone mass. You can completely free your hands to read these measurements at a glance without having to open your APP for every measurements. Three Guarantees for High Accuracy: This ultra-precision body fat scale, adopting the advanced BIA technology, is equipped with 4 high sensitive electrodes and 4 high precision G-shape sensors that have passed 100,000 times sensor performance tests to enhance accuracy.The scale ensures accurate measurement results to within 0.2lb/100g and has a maximum weight capacity of 400lb/180kg. 13 Essential Body Composition data Analyzer: Runstar Scale utilizes electrical Bio-Impedance Measurement Technology to calculate including Weight, BMI, Body Fat, Fat-free Body Weight, Subcutaneous Fat, Visceral Fat, Water, Muscle Mass, Bone Mass, Protein, BMR and Body Age. You can monitor and track your body data over time periods (by weeks, months or even years) on Starfit App anytime anywhere, which can help guide you towards a healthier lifestyle or track your fitness progress User-friendly APP: You can download the Starfit app from App Store or Google Play. The smart scale supports offline measurement, which allows the data be measured and automatically synced onto the APP after connecting the app to complete the first measurement. The app also syncs easily with other fitness apps like Apple Health, Google Fit, and Fitbit