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Fascinating footage shows exactly how the Apple Watch ejects water in slow motion at 2000fps

Home> Social Media> YouTube

Published 11:55 29 Apr 2025 GMT+1

Fascinating footage shows exactly how the Apple Watch ejects water in slow motion at 2000fps

The Slow Mo Guys demonstrated how the Apple Watch ejects water from its speakers

Rikki Loftus

Rikki Loftus

Featured Image Credit: YouTube/@theslowmoguys
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Fascinating footage has revealed exactly how the Apple Watch ejects water.

A handy feature with the Apple device is that you can eject water when you’ve worn it while swimming.

To try out the feature for yourself on your own watch, you’ll first need to turn on Water Lock.

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Afterwards, simply turn off Water Lock to activate the process that ejects water from the watch.

This is achieved using vibrations to clear water from the speakers.

And if you want to see how it happens, a YouTube channel has uploaded a demonstration where they try out the feature in slow motion at 2000fps.

Filmed for the channel, The Slow Mo Guys, host Gav activated the Water Lock before submerging his Apple Watch.

Afterwards, viewers got an up-close, slow motion view of how the device ejects the water.

Explaining the process, Gav said: “It ejects all the water that’s inside it through the two speaker holes using the speaker itself, it just sort of fires water all over your wrist.”

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He went on to say: “After the initial burst, it actually looks like a lot of the water gets trapped. It’s trying to get out, but then gets sucked back in by the speaker retreating.

“So what it does, it stops, allowing the water to settle against the back of the speaker. Starts again, which causes anotherburst of water to fly up.

“It does 10 full cycles of that. I think due to the sharp edge of the speaker hole, followed by the metallic surface that’s curved, it caused droplets to form around the speaker holes, which once big enough would just drip off.

“I think if you were wearing the watch at this point, it would potentially just get pulled off onto your wrist.

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The Apple Watch ejects water from its speakers after swimming (YouTube/@theslowmoguys)
The Apple Watch ejects water from its speakers after swimming (YouTube/@theslowmoguys)

“The surface tension of this droplet causes the smaller ones inside just to come out and join this one.

“I should point out that the macro lens is making this look a lot bigger than it is, that’s actually a very tiny droplet there.”

Viewers of the clip were impressed by the slow motion explanation of the Apple Watch’s handy feature, with many taking to the YouTube comment section to share their own reactions to the video.

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One user wrote: “That’s...actually some brilliant engineering. Apple generally seems to have top-notch engineering in their stuff.”

Another said: “It frustrated me so much that the droplets kept getting sucked in.”

And a third person added: “If only I could do this with my ears after swimming.”

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