Smart body fat scale adopts advanced Bio-electrical Impedance Analysis (BIA) Technology to measure 15 key body composition. High quality control ensures your accurate data reading to know your every day's changing, saving your historical progress daily, weekly, monthly, even yearly on app. Warm Tips for Using Dr care Smart Scale: Ensure Bluetooth of your cellphone has been opened. Download the APP in the app store and link to the scale. Your feet should be dry, bare and be touching all 4 electrode areas. Use your mobile phone to view various data. 13 Essential Body Composition Analysis Instant accurate readout as soon as you step on the Body Fat Scale. This scales digital weight and body fat weight scale is perfect for you to track weight loss and health progress. With these in-depth analysis, you’ll be able to focus on what matters most to you.