Simply sync your weight profile with the free included weight loss app, and you will track every inch of your body so you know exactly how to address your strengths and weaknesses. The Futura Bluetooth weighing scales measure your body from head to toe and effortlessly tracks multiple people with new Bluetooth wireless technology. Includes 2 AAA Batteries Smart App compatible The fitness app syncs with Google Fit, Apple Health Get reliable readings from the 4 highly-sensitive electrodes located beneath the tough tempered glass platform Sensors measure in increments of 0.05kg (0.2lb) Accurately measures 12 kinds of body compositions Features auto-calibration for absolute accuracy The smart scales require the user to use their bare feet for the weighing scales body to read your measurements 12 Essential Measurements Our body fat scale, accurately measure 12 kinds of body compositions for you.