What is the capacitive sensor in the Xiaomi Smart Watch?

The capacitive sensor in the Xiaomi Smart Watch typically refers to the touch-sensitive surface on the display.
Here are some common purposes the capacitive sensors can be used in smartwatches:
1. This sensor detects changes in capacitance when you touch the screen with your finger or a stylus. It's a component that enables you to interact with the smartwatch's interface, such as tapping to open apps, swiping to navigate menus, or pinching to zoom;
2. Capacitive sensors can detect when the watch is being worn on the wrist. This information is often used to automatically activate the display when you raise your wrist to view the time or notifications;
3. It can be used to wake up the display when you bring your wrist closer to your face, or to prevent accidental touches when the watch is not in use.