【13 ESSENTIAL MEASUREMENTS】 Using the bio-impedance technology of the impedance meter scale allows you to measure your physical information: weight, BMI, water, metabolic age, basic metabolism, fat mass, muscle mass, muscles skeletal, bone mass and protein content. The impedancemeter scale accurately analyzes body composition and tracks your diet and sports progress for good health 【GOOD COMPATIBILITY】 This connected impedancemeter scale connects with the Fitdays Application on mobile phone, supports mobile phone system Android 5.0 and above, iOS 8.0 and above. The free FITDAYS app is very easy to use. You can download it from Apple Store / Google Play or scan the QR code in the manual. The data collected in the application can be synchronized with Apple Health, Googlefit etc. 【24 USER SUPPORT】 The personal weight scale allows you and your family to share an impedance meter together and download APP for free through their own devices or the same device. Baby mode, which allows you to easily and safely measure the baby's weight without the baby scale 【G-SENSOR MEASUREMENT TECHNOLOGY】Equipped with 4 high-precision sensors, the personal scale base connected is non-slip at 4 points, its maximum capacity up to 400lbs/180kg in increments of 0.2 lbs. 2 3*AAA batteries are included, and automatic on/off. You can change the weighing unit under "UNIT" - kg / St / lb