Apple Watch Ultra

Press the Digital Crown.

Press the settings icon.

Press Action Button.

Press Action.

Press the required setting.

Press arrow left.

Press First Press.

Follow the instructions on the screen to select more settings.

Press arrow left.

Press the indicator next to "Hold to Turn On" to turn the function on or off.

If you turn on use of siren, you can turn on the siren by pressing and holding the Action button. When you turn on the siren, your Apple Watch plays a continuous sound that can be heard up to 600 metres away.

Press the Digital Crown twice to return to the home screen.