1. Home button.
A long press turns the watch on and off. Once it's on, a short press turns the display on or off. Within a menu, press it briefly to exit the menu and return to the home screen, or to pause/resume or stop the sport you’re doing. It also rotates, allowing you to scroll vertically through the different menus.
NOTE: This button isn't removable like on some watches. If you force it out, you can damage it.
2. Heart rate and SpO2 sensors.
These sensors must be pressed firmly against your wrist to measure correctly.
3. Charging connector.
Bring the magnetic end of the charging cable to this connector so it attaches to the watch. Connect the USB end to a USB charging port to charge your device.
4. Microphone.
5. Speaker.