The Ozeri Precision Digital Bathroom Scale features auto-calibration technology that makes tracking your weight easy, right out of the box. With StepOn Activation, your body weight is displayed immediately upon stepping onto the scale. The Ozeri Precision Digital Bathroom Scale also features a handy Tare button that allows for quick and easy weighing of your infant, pet or luggage item, while in your arms. It accurately displays results in increments of 0.2 pounds or 0.1 kilograms on its easy-to-read widescreen LCD, and weighs up to 440 lbs or 200 kg. It also boasts a convenient unit button that instantly changes the unit of measurement from pounds to kilograms and British stones. The Ozeri Precision Digital Bathroom Scale is accurate and easy to use, and made out of impact-resistant tempered glass. It turns off automatically to conserve battery life and runs on 2 AAA batteries (included). Your Satisfaction is 100% Guaranteed.