Aquarius 9 in 1 Digital Bathroom Weighing Scales gives readings of weight, fat, water, muscle mass, bone mass, BMI, BMR, body age and visceral fat. Automatic shut-off to conserve energy. Unit button to switch between weighing modes. Four contact sensors to identify each individual user’s profile, including height, age and sex. High precision strain gauge sensor. Advanced step-on technology: gives weight readings immediately. Large negative LCD display: shows readings with large visible numbers. Measurements can be read in three weighing modes: kilograms (kg), stones (st) and pounds (lb). Can be programmed to automatically recognise eight people. 6mm tempered safety glass platform. Automatic on/off. Low battery/over load indication. Weight capacity: 396lbs/180kg. Power: two 1. 5V AAA batteries (not included). Compatible Devices : iOS devices : iPhone 4S and higher, iPad 3, iPad Mini or higher. Android devices : Android 4. 3 or higher with bluetooth 4. 0 or a higher version.