Ecopower. Does not use batteries. By pressing the eco power push button, Electrical Energy Required in Order to Operate Is Automatically Generated, Which Makes It More Environmentally-Friendly. Tenbia: Bioelectric Impedance Measuring Method (BIA) with Full Body Analysis Through 6 Basic Parameters: Weight, Body Fat, Muscle Mass, Bone, Water and Body Mass Index. Total control of your progress. Thanks to the app, You Can Track Your Progress Perfectly. It saves the parameters After each Measurement for You to Clearly Check Your Improvements. Four Precision. STIs 4 high-precision sensors allow more precise and exact measuring. Easy Usability Thanks to the Auto Shut-Off Function, The Fast and Simple Power-on and its Overload Indicator. Viewing with its Large-Sded Lcd Display. it has automatic substart function. Includes 4 Support Feet That Improve Floor Grip and Add Security. Auto Shut-Off After 3 Seconds of No use.