mbeat® 'actiVIVA' Bluetooth BMI and Body Fat Smart Scale with Smartphone APP Featurs: Step on and automatically switch on. Bluetooth function transfer data to your smartphone. Measure, calculate and record your data all in one APP. Including body weight, body fat, BMI, body water, bone mass, calorie, visceral fat and body age. Equipped with high precision strain gauge sensor in the smart scale. Low batteries and error indicators. Use 2 x AAA batteries. Specs: Maximum Capacity: 180 kg / 396.8 lb Division Graduation: 100 g / 0.22 lb LCD Display Size: 73x29 mm / 2.87x1.14 in Switch On: Step on the scale and automatically switch on. Switch Off: Auto switch off and auto switch to zero. Indication: Lo-Low battery, Err-Overload Battery: 2 x AAA batteries. Product Size: 30 x 30 x 2.5 cm / 11.8 x 11.8 x 0.98 in Product Weight: 1.57 kg /3.46 lb Package Size: 32.5 x 33.3 x 4.5 cm / 12.8 x 13.0 x 1.77 in Package Weight: 1.8 kg / 3.97 lb Package Content: Body Scale, User Manual, 2 x AAA Batteries