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