XLR connectors are professional audio connectors designed for balanced audio signals, providing high-quality sound with low noise and interference. They are most commonly used for microphones and audio equipment in recording studios, live sound systems, and broadcasting.

XLR connectors typically have three pins, although versions with more pins exist for specialized applications. Their locking mechanism ensures a secure connection that will not accidentally disconnect during use.

In simple terms, XLR connectors are reliable, professional-grade connectors used to transmit clean audio signals in demanding environments.