These scales are typically made with a tempered glass surface and have metal electrodes (the silver pads) on top. They feature a digital display and often connect to a smartphone via Bluetooth. The scales use bioelectrical impedance analysis (BIA) technology to measure various body metrics. Purpose: The primary purpose of these smart scales is to provide a comprehensive analysis of a person's body composition beyond just their weight. When a person stands barefoot on the scale, a weak electrical current is sent through the body, and the resistance is measured to estimate different health metrics. The data is then synced to a smartphone app, which can track and display information such as: Body weight Body fat percentage Body Mass Index (BMI) Muscle mass Bone mass Body water percentage Visceral fat Metabolic age