If you’re shopping for a new smartphone, speaker, headphones or watch, you might have come across the term IPX4. Here’s what it means.  Many tech products these days carry an IP (Ingress Protection) rating. These ratings are designed to give consumers an idea of exactly how much dust and water a device can withstand. This lets you know if it’s safe to take your smartwatch swimming or if you should be shielding your headphones from the rain.  Here’s what
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