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<http://schema.org/text>
"A device with an IP67 rating is dust-tight, meaning it is protected against dust ingress, and it can withstand immersion in up to 1 meter (about 3 feet) of water for up to 30 minutes. However, an IP68-rated device is also dust-tight and can withstand immersion in water beyond 1 meter."
<https://talker.network/everything-you-need-to-know-about-walkie-talkies-in-2023-the-ultimate-guide/>