With its affordable Push to Talk (PTT) Switch, Pilot USA frees you from the need to fumble with your aircraft's hand mic for every ATC interaction. Instead, simply connect your headset to this PTT switch for easy external communications at the push of a button. The switch's Velcro fastener easily secures it to any GA yoke for reliable access right under your thumb. Simply plug your headset's standard .206" mic plug into the unit's port and the unit's .206" jack into the aircraft's mic port and you're good to go. Works flawlessly both with and without an intercom. A must-have item for CFIs, aircraft renters, and anyone else who frequently flies a variety of airplanes.