FSA / HSA ELIGIBLE. Starfit APP syncs with Apple Health, F1tbit, 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 scale must be done in the Starfit APP prior to 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.