This listing is for a David Clark H20-10X Aviation Headset, model 40726G-03. This model features Active Noise Reduction (ANR), indicated by the “ERC” marking on the headset — confirming it's equipped with David Clark’s Electronic Noise Cancelling system. Designed for use in helicopters and other aircraft using a single U-174/U plug, it provides clear communication, reliable performance, and excellent comfort for extended use.

Details:

• Model: H20-10X

• Part Number: 40726G-03

• Noise Reduction: Active Noise Reduction (Electronic Noise Cancelling – ERC)

• Plug Type: Single U-174/U (common in helicopters and military aircraft)

• Microphone: M-7A noise-canceling electret microphone

• Ear Seals: Gel-filled for comfort

• Cord: Coiled with in-line ANR battery box (9V battery required; not included)

• Weight: Approx. 19 oz.

• Certifications: FAA TSO C57 Cat. B and C58a approved

Condition:

• Unused, but shows some light surface scratches from handling/storage

• No travel bag included

• Foam microphone windscreen is missing

• Marked “ERC” confirming ANR capability

• Headset has been fully tested for functionality

Compatibility:

Designed for aircraft equipped with a single U-174/U jack — common in helicopters and some military aircraft. Not compatible with dual GA plug systems without an adapter. Always confirm fitment with your avionics setup or technician.