POWER THE WATCH ON: Press and hold the Rotating Side button. Note: If you are unable to turn your device on, plug the device into a power source for 15 minutes, and then try again.
POWER THE WATCH OFF: Press the Rotating Side button.
Scroll to and select Settings.
Select System.
Select Power off. Select the Check icon to confirm. Note: If you are unable to power your device off or if it becomes unresponsive, press and hold the Rotating Side button for 10 seconds, until it reboots.