David Clark DC 8692 - UltraLight Single-Ear Intercom Headset (XLR4 Female)Series 8500 and 8600 Headsets connect to a variety of Pro Audio equipment. Headsets are designed for comfort during long periods of use, durability to stand up to rugged use in harsh environments and reliability to provide clear communication for a variety of applications. Features: Single Ear 4 pin XLR female connector Passive electronic design for low noise environments M 2H high output noise canceling microphone ensures superior transmit clarity