Optitect Smart Weight Scale is a product that helps you track and monitor your weight and reach the ideal weight. It measures the weight accurately and displays results on an easy-to-read digital screen.It is compatible with the Dr. Nutrition app via Bluetooth, allowing you to provide the app with weight information and track it over time. It securely stores your personal information in the Dr. Nutrition app's cloud collection, allowing you to access it from any other device on which the app is installed. It provides detailed reports and accurate information about your health and performance, enabling you to track your progress and take appropriate actions to improve your overall health. Features of Optitect Smart Scale PRODUCT SPECIFICATIONS "Optitec Smart Scale 4.0". Measurement unit: kg. Communication: Bluetooth. Weight range: 11.0 lbs to 396.8 lbs (equivalent to 5 kg to 180 kg). Net weight: 1.74 kg. Battery capacity: 1000 mAh. Input voltage: constant current 5V Charging specifications: constant current 5 volts 0.5 amps