Measuring Functions: % Body Fat, % Total Body Water, % Muscle Mass and Bone Mass * Proprietary Automatic User Identification Technology; Stores personal data for up to 8 users * EatSmart "Step-On" Technology - Get instant readings with no tapping to turn on! * Large 3.5" Blue LCD display with white backlight - Easy to read. * Auto Calibrated; Auto Power-Off; Runs on 4 AAA batteries (included); 100% EatSmart Satisfaction Guarantee