Economical Rechargeable: Save with rechargeable weighing scales, similar to smartphones. Built-in lithium battery ensures lasting value. USB cable included. Accurate 8 Measurements: Utilizing BIA technology, track 8 metrics: weight, fat, bone, water, muscle, BMI, BMR, and visceral fat. Set goals, refine your fitness journey with these smart bathroom scales. Effortless Progress Tracking: The app conveniently monitors your weight history. It's compatible with iOS (iPhone 4 s/5 /5s/6/6 s/7/8 or later, iOS 6.0 or later) and Android (Android 4.3 or later), Bluetooth 4.0 or above. Precision Display: Gain instant weight readings (Kg, St: lb, lbs) confidently. Four high-precision electronic weighing scales ensure accuracy, supporting up to 180 kg/400 lb/28 st. The 6-color LCD display adds style, indicates weight ranges. Health Journey for All: Multi-user support facilitates sharing precise body analysis. Encourage healthier lives for your loved ones with these bluetooth electronic scales. Note: Use on an even surface for accuracy; avoid carpets.