When you see an "X" as the first digit, it means the device hasn't been specifically tested for solid particle (dust) protection.
In the world of international standards, "IP" stands for . These ratings are essential for moving past vague marketing terms like "waterproof" and understanding exactly how much environmental stress a device can handle.
An IPX6 rating means a device can withstand high-pressure water jets and heavy rain. The rare IP69 rating is even more extreme, designed to survive close-range, high-temperature power washing and steam cleaning. The Role of MP4 in Tech Demos Ultimate Guide to Video File Formats - MPB
