Super High Quality and Accuracy. Posture scale is equipped with 4 high precision G-shape sensors and 4 high sensitive electrodes, with advanced BIA technology to ensure your accurate readings with division at 0.2lb/100g, up to maximum capacity 400lb/180kg. With extra large display, low power / overload indication, step-on technology and 4xAAA batteries included. Easily sync with Health Apps. Free download FITDAYS app from app store or Google play, and FITDAYS app can easily sync with Apple Health, Google Fit, Samsung Health, Fitbit and so on, which let you store and share your data more conveniently. Smart phones can bind and record all the changes automatically with this scale. Essential Body Data. Posture smart scale not only shows weight but also BMI, body fat, subcutaneous fat, body water, protein, BMR, body age etc., by electrical Bio-Impedance Measurement Technology. You can weigh yourself and check your body data anytime. Keep Tracking Your Effort Easily. The Fitdays app provides detailed charts and saves historical data to track the changes of your body composition over days, weeks, months or even years. Its Athlete Mode also gives fitness persons a precision analysis of their body. Unique Heart Rate and Body Shape Index Function. Posture adopts newest BIA smart chip to measure not only body fat, but also show the change of heart rate, heart index, knowing your body status in all aspects. To test your body shape to keep a good posture in daily life.