The SWATCOM A-KABEL Passive Ground Mechanics Headset (AK-5850H) is a noise-canceling headset for connecting directly to an aircraft. Supplied with or without in-cup PTT (push-to-talk) and 1/4" stereo connector for direct connection to aircraft intercom port or into pushback lead or direct to pushback tug. The noise canceling boom microphone gives a high perception of speech by filtering out background noise.