Waterproof and water-resistant are marketing terms with no legal definition. Manufacturers use them loosely, creating confusion. The actual standard is the IP rating—a two-digit code that specifies dust and water resistance with precision.
IP ratings start at IP67 or higher for water protection. IP67 means the device survives thirty minutes submerged in one meter of fresh water. IP68 extends that to deeper depths or longer times, depending on the manufacturer's claim. These specifics matter; marketing language doesn't.
A device rated IP67 survives accidental splashes and brief submersion. It won't survive extended underwater use. IP68 offers more protection but still has limits. Reading the actual rating and manufacturer specifications beats trusting 'waterproof' labels.
Before buying a device for water exposure, verify the IP rating and test conditions. Saltwater differs from fresh water. Pressure differs from static submersion. The fine print reveals what marketing glosses over, ensuring you buy a device that actually survives your intended use.