• Sync with the Fitday & Onfit Apps: Get Fit smart body weight scales give you everything you need It saves your measurements to your smartphone and connects your Apple iPhone or Android device via Bluetooth to get a complete understanding of your body composition and physical well-being. Within the app, you can view 15 body composition analyses. • 13 Essential Body Composition Metrics: The best smart scales are designed to help you stay on track, whether you want to achieve fitness goals, maintain your current form, or gain insight into your body. Get Fit uses Bioelectrical Impedance Analysis (BIA) technology to monitor 13 important body data: Body Weight, BMI, Body Fat Percentage, Body Hydration, Skeletal Muscle, Fat-free Body Weight, Muscle Mass, Bone Mass, Protein, Basal Metabolism, Metabolic Age, Subcutaneous Fat, and Visceral Fat.• A Highly Accurate Digital Scale: Equipped with high precision sensor and auto-calibration, the Get Fit scales ensure remarkable accuracy (±0.1g/0.2lb), powered by 2 pcs 1.5V AAA batteries. Choose from 3 measurement units: st / kg / lb with a maximum capacity of 180kg/400lb.?mm thick, high-quality hard glass plate, sized 28 cm by 28 cm and high-visibility backlight LCD digital display is ideal for daytime and nighttime use. The auto-Off/On saves energy and ensures a longer-lasting battery life.• Smart Auto-connection: Get Fit knows that you do not always carry your phone, and so this scale can connect with Bluetooth. There is no need to carry your phone when weighing, since the Get Fit body weight scale can upload your data to your phone. That means the next time you open your Fitday or Onfit App, your composition data will sync to the app once it is connected. • Multiple User Profiles: The Get Fit smartphone app allows for unlimited user accounts, each holding up to 24 profiles. This gives every family member a clear shot on their health information so they can set goals, save historical data, and track daily, weekly, and monthly progress.