David Clark H10-66 Aviation Headset

David Clark H10-66 Headset A unique dual impedance headset for use in civilian and military style aircraft. HIGH/LOWimpedance select switch on dome matches headset to radio impedance Brand new in the box , Made in USA U174 Single plug Features : -New Comfort gel, undercut ear seals -High/Low impedance select switch on dome matches headset to radio impedance -Hinged wire boom with the M-101 amplified Dynamic microphone -Noise Reduction Rating (NRR) of 27 dB -FAA TSO Approved C57 Cat. B and C58a -Exceeds RTCA/DO-214 Standards -Coiled cord terminates into a U-174/U plug. -Weight (without cord assembly): 22 oz.