Momax EW2S Lite Tracker IoT Smart Body Fat Scale-Easy Bluetooth pairing, Momax Smart App can create a body data database of up to 20 users, using BIA (bioimpedance analysis) technology, micro-current detection of bioimpedance. Applies BIA (Bio-impedance Analysis) technology. A small amount of weak current flows through the human body so as to detect the Bio-impedance and estimate BMI, body fat, body water, muscle mass, bone mass and BMR. The electrical current is small and may not be felt. This BIA technology is cheap, safe, non-invasive, toxic-free and harmless. It also possesses the characteristics of simple operation and abundant information. You can monitor your 13 types of body datas like Weight/body fat/water/BMI/muscle mass/basic metabolism/Protein / bone mass / lean body mass / visceral fat grade/Body type/body age/body score It will automatically turn on when you step on it with bare feet, and will automatically turn off after 10 seconds of inactivity Tempered glass panel, simple, durable and easy to take care of , , Weighing range : 5 - 180 kg (max. weighing 180kg) 11 - 396 lbs (396lbs max. ), Warranty : 2 Years