David Clark 40074G-01 Model H10-20 Mono 5-Foot Straight Cord Aircraft HeadsetsSuper Soft Head PadNew Comfort gel, undercut ear sealsFlex boom assembly can be adjusted for perfect microphone placementM-7A, the most advanced noise-cancelling microphone availableSuperior noise attenuation (NRR 24dB)Low-profile volume control knob with detent settings Weight (without cord assembly): 19 oz.FAA TSO Approved C57 Cat. B and C58a Exceeds RTCA/DO-214 Standards CODE: 40074G-01