Specifications: Weight Capacity: 400 lb / 180 kg / 28 st Increments: 0.1 kg?m?10 kg, 0.05 lb / 0.02 kg ;>10 kg? m? 180 kg, 0.1 lb / 0.05 kg Weight Units: lb / kg / st Platform: Tempered Glass Battery: 3 x 1.5V AAA Batteries (Pre-Installed) Dimensions: 11 x 11 x 1.1 in / 28 x 28 x 2.9 cm Operating System: iOS® 12.0+ or Android™ 6.0+ (Some features, service and products may not be available in lower versions. Since App develops, the features and service in the App may vary without further notice) Note: 1. Don't worry about the electrical current. Consult a healthcare professional before using the smart scale if you use medical electronic equipment such as a pacemaker, or you can turn on its thoughtful Zero-Current Mode to measure weight and BMI only. 2. Please note this scale is not intended for use by professional athletes.