I bought this with the idea to convert it to a ham headset but never got around to it. I did plug it into my amateur transceiver and the headphone portion sounds great and it also has good isolation from surrounding noises.
Here is some info from the Flightcom website, also the link to specs, etc. https://www.flightcom.net/products/general-aviation-products/classic-headsets/4dlx-classic/
The 4DLX Classic is a general aviation style headset at a price to fit any budget. The dual volume controls allow for independent volume adjustment in each ear dome and the precision flex boom, with noise canceling electret microphone, provides exact positioning.
Other than me trying the headphone part, it has never been used,
I'll ship it in the US Priority Mail for $79, Paypal or postal money order.