Liquid and dust resistance. NP2 is only rated at IP54, which is definitely not ideal.

In this case it’s “Ingress Protection” rating - as in how well it prevents water and dust from getting inside the phone when exposed.

Edit: since I’m on hold and bored, here’s the Bard description of the rating system

The Ingress Protection (IP) rating system is a two-digit code that tells you how well an enclosure is protected against dust and water. Here’s a quick breakdown:

• First digit: This is for solid objects, like dust, fingers, or tools. It goes from 0 (no protection) to 6 (dust-tight).
• Second digit: This is for water, like splashes, rain, or immersion. It goes from 0 (no protection) to 9 (protected against high-pressure water jets).

So, an IP67 rating means the device is dust-tight and can withstand being submerged in water for a short time.

Here are some real-world examples:

• IP44: Splashproof phone, suitable for light rain or spills.
• IP65: Dustproof camera, good for outdoor use but not submersion.
• IPX7: Waterproof smartwatch, can survive a dunk in the pool.
• IP68: Rugged phone, can handle being underwater for extended periods.

Remember, IP ratings are just guidelines. Always check the manufacturer’s instructions for specific usage advice.

I believe the ip rating they are referring to has to do with the level of waterproofing in the phone. Like how the iPhone has an IP68 meaning that it is water resistant up to 6 meters for 30 minutes in fresh water.