Ozeri Weightmaster Ii 440 Lbs Body Weight Scale, Step-On Bath Scale With Bmi And The Ozeri WeightMaster II 440 lbs. Digital BMI Scale with Weight Change Detection was designed to provide a comprehensive yet simple weight management solution to measure and track your weight. Featuring BMI Measurement and Auto Recognition Technology, the Ozeri WeightMaster II weighs up to 440 lbs. and displays your BMI (Body Mass Index), a measure of your body fat based on your height and weight. Immediately after displaying your weight and BMI, the scale's Weight Change Detection displays your "net weight change" from your last weigh-in (L1), the average of your last 3 weigh-ins (L3), last 7 (L7) and last 30 weigh-ins (L30). For users who would rather just focus on their weight trend without worrying so much about the actual numbers, the WeightMaster II features Color Alert Technology, which displays your weight change in a GREEN illumination for weight loss and RED for weight gain. The WeightMaster II requires no complicated synching and spares you the data connection failures common to more expensive wireless and Bluetooth alternatives. Durably made, the WeightMaster II features a slip-resistant grooved ABS exterior reinforced with a tempered glass interior and non-slip scratch-resistant feet that won't damage flooring. Ships with batteries included. BMI with Weight Change Detection Technology -- Instantly displays your BMI (Body Mass Index), current weight, and your net weight change since your last weigh-in Accurate Weight Tracking with 30 Day Memory -- Instantly see how your current weight changes from the previous day, up to the previous 30 days Smart LCD with Color Alert Technology -- Displays your weight change in color, with a GREEN illumination for weight loss and RED for weight gain, providing visual feedback of where your weight is trending day to day, over the last 3, 7, and 30 days Immediate and Flawless Results -- Performs and displays all calculations on the scale?s LCD without complicated synching or data connection failures common to more expensive wireless and Bluetooth alternatives Robust Construction, Industry-leading Capacity and Built-in Intelligence -- Weighs up to 440 lbs with auto-recognition technology for 8 unique users. Automatically calibrates with StepOn technology and auto-powers off