Runtastic Libra - the scale that speaks with your smartphone/tablet!Analyze important body metrics including weight, body fat and water percentages, muscle and bone mass, BMI, BMR and AMR (calories burned). The scale works with the free Runtastic Libra app and you can set custom goals to achieve your ideal weight or body composition. Choose your activity level and the Runtastic Libra is able to generate exceptionally accurate results. Units can be displayed in kg, lb or stone. The scale can measure weight up to 400lbs (180kg). The data transfers from the scale to your smartphone or tablet using energy-efficient Bluetooth Smart (4.0) technology and has a range of 80 feet (25 meters). The scale can recognize up to 8 unique users and automatically assesses their personal body metrics. On Runtastic.com, you can use your body metrics to generate detailed statistics and in-depth analysis. Runtastic.com is also the ideal “home base” for your health and fitness journey, where you can save tracking details and review progress based on all your Runtastic activities.