The DAVID CLARK Model H10-40 Aviation Headset with M4 Microphone is a high-quality pilot gear product manufactured in the United States by David Clark. This headset is specifically designed for aviation use and is compatible with Aviat makes. It comes with a manufacturer part number of H10-40 and includes a reliable M4 microphone for clear communication. While this product does not come with a warranty, it is a mint condition item that is sure to meet the needs of pilots seeking top-notch aviation accessories.