Free Two different designed belts with same color. X90 MAX SMART WATCH for different activities like running, cycling, swimming, and more. Sensors: Various sensors, such as accelerometers, gyroscopes, and barometers, enhance the accuracy of fitness and health tracking. Interchangeable Bands: Customize the look of your smartwatch by changing bands to match different occasions or your personal style.Smart Home Integration: Some smartwatches offer compatibility with smart home devices, allowing you to control lights, thermostats, and other connected devices from your wrist.