Main Fuctions 8 Essential composition analysis Track the 8 fitness indicators about Body Weight, Body Fat, Body Water, Muscle Mass, Bone Mass, BMI, BMR and Visceral Fat.USE this data you can have a more reasonable diet and keep a healthier condition High Accuracy and Working Theory The Smart Scale is equipped with four high-precision sensors and four electrodes to ensure a quick and accurate body composition analysis,this divice is based on BIA(bioelectrical impedance analysis)technology. To measure body bioelectrical impedance,it makes the results much more accurate with new measuring technology Range OF Application Any measurement obtained using this device is for reference only and should not be considered as a medical opinion,Consult your primary care doctor or physician before making changes to your diet,exercise plans or physical activities Note 1.Please put the digital scale on a hard and flat surface.Avoid carpet or other soft surface. 2.Please ignore the first readout after the digital scale be moved since scale need to have a recalibration. 3.Not recommended for any person using a pacemaker or other internal device 4.DO NOT overload the scale(maximum 396lb/180kg) 5.Make sure your feet are dry before stepping on the scale 6.DO not stand on the edge of the scale or jump on it. Package included 1 x Bluetooth Body Scale 1 x User Manual 1 x USB charging cable