The IP34 rating is a standardized code that describes the resistance of electronic devices, such as headphones, speakers, or MP3 players, to external influences. The abbreviation IP stands for Ingress Protection. The first digit '3' indicates protection against the ingress of solid foreign objects 2.5 millimeters in diameter and larger. The second digit '4' specifies protection against splashing water from all directions. For users, this practically means that a device with this certification is resistant to sweat during sports or light rain, for example, but it is not waterproof and must not be submerged in water.