This Phoenix Fitness Smart Body Scale is the essential tool for tracking your health journey. It measures not just weight, but a full 14 body composition metrics, including BMI, body fat percentage, muscle mass, and BMR. The scale connects via Bluetooth to the Fitdays+ app on your smartphone or tablet, which is compatible with iOS 8.0+ and Android 6.0+. To get a full analysis, simply step onto the scale with bare feet. The Fitdays+ app allows you to track trends, manage unlimited user accounts, and features a Baby/Pet Mode for easy weighing. The unit can be switched between kilograms (kg) and pounds (lb) using a button on the underside. The scale has a maximum weight limit of 180kg. It operates on 3 × AAA batteries. Always place the scale on a hard, flat surface for the most accurate results.