What does the Action Button do?

I searched for this answer in the user manu;a md here on the forum, what does the action button do that is on top of the U400?

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I wondered that same thing last week. This is all that I have been able to find in the user’s manual—
Long press for 5 seconds:
This will toggle on/off the Auto-Lock on Close feature.
Once door is closed, it automatically locks after a set time.
You can adjust the auto-lock timer after binding it to the Aqara Home app

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Yes - it manages auto-lock only. I was told it will become configurable in a future update. Though I don’t personally see the need.

Once we’ve refined the UWB experience, we plan to add more automation features for the U400. For example, long pressing or double pressing the action button can be set as an automation trigger.

This way, before you leave home, you can simply activate your preset automation on the lock to turn off all the lights and appliances in your house.

Please stay tuned for future updates!

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