Special Features: Body Mass Index, Body Fat, Bone Mass, Bodyweight, Basal Metabolic Rate Weight Limit: 400 Pounds Starfit APP syncs with Apple Health, Fitbit, and Health Connect. Compatible with Fitdays. 7 DATA READINGS ON DISPLAY: The scale handle is equipped with a bright TFT LCD in full color, making it easy to read the data. Immediately following the measurement, the 7 key body composition metrics will be shown, and the difference from the previous result can also be read on the display. (Bluetooth pairing with the scale must be done in the Starfit APP before measurement) 28 BODY COMPOSITION METRICS: Runstar 8-electrode bathroom scale through both hands and feet touch electrodes, high and low dual-frequency current simultaneous measurement of the upper limbs, lower limbs, torso, presenting BMI, body fat, muscle mass, and other 28 body composition accurate measurement data. People who often exercise are recommended to use the athlete mode, which has a more accurate algorithm INTUITIVE PARTICULAR DATA TRACKING: Every measurement captured by the Starfit APP will be saved for you to monitor your health progress. You can review previous records by day, week, month, or year, and easily track your weight loss or muscle gain. Additionally, the APP allows you to create an analysis report that can be printed and shared with loved ones or on social media platforms UNLIMITED USERS: Runstar Smart Scale has a larger weighing surface measuring 300*300mm (13*13 inches) and extended electrode pads to accommodate various foot sizes. It can support unlimited users, and up to 24 profiles can be created using a single Starfit APP account, making it ideal for families and fitness groups. Please note: Only one account (1 device) can be connected to the Scale at a time