Headphones with IPX4 protection

IPX4

— headphones that have a moisture resistance of 4 according to the IP standard.

This level is positioned as "protection against splashes from any direction." In fact, this allows the headphones to endure at least moderate rain with wind; also similar models can be used practically without restrictions at sports activities which are not connected with water. But being under a shower or a heavy downpour can end sadly for such a device; so in such conditions a higher level of moisture resistance is desirable.

Note that instead of the letter X in the marking of such headphones, there may be another number describing the resistance to dust and foreign objects. Moisture resistance level 4 is usually combined with dust resistance level 4 (protection against objects with a thickness of 1 mm or more) or 5 (some dust is allowed to enter without affecting the operation of the device). Specifically, the designation with the letter X (IPX4) means that this model has not been tested for dust resistance and has been certified only for moisture resistance.