Navdy powers on automatically when placed onto the mount. If Navdy doesn't power on, click the power button below the lens on the display. You will see a white light indicating it has power. You will also see an animation as it starts up.
You can power off Navdy by clicking and holding the power button for 2 seconds which will begin the shutdown process. It also shuts down automatically with 7 minutes of inactivity or when removed from the mount.