40880G-01 Headset Adapter allows a low impedance (Military Type), single plug, headset to be used in a general aviation aircraft. U92 A/U socket to M642/4-1 (PJ055) and M642/5-1 (PJ068)
Impedance Converter: High (General Aviation) Helicopter to Low (Military) Allows a high impedance GA helicopter equipped with U174/U plug to be used in military low impedance aircraft (Battery power 9V).
Amplified Impedance Converter: Low (Military) to Helicopter (General Aviation) Helicopter U92A jack converts military headset to single plug (U174/U) for General Aviation Helicopter.
Impedance Converter: High (General Aviation) to Low (Military) This adapter converts GA high impedance mic & transducer to Military low impedance mic & transducer for use in Military aircraft (Battery power 9V).