1. Home button.
Press and hold to turn the watch on and off. Once it is on, briefly press to turn the screen on or off. Within a menu, briefly press it to exit the menu and return to the home screen, or to access the pause or stop options for the sport you are doing.
NOTE: This button is not removable, as it is on some watches. If you force it outward, you may damage it.
2. Heart rate monitor and oximeter.
These sensors must be placed against your wrist to take the measurement correctly.
3. Charging connector.
Bring the magnetic charging base close to the back so that it attaches to the watch. Connect the other USB end to a USB charging port to charge your device.