Bose X Aviation Headset. Condition is "Used". The Bose Aviation Headset is an active noise reducing (ANR) headset. You will need to purchase an Amplified Impedance Converter/Low to High for General Aviation since it has a helicopter plug end. They can be purchased on EBay or Amazon for about 0.00, you want a quality product. The ear pads show wear and can be replaced from the Bose website for about .00, they’re still very comfortable. Thanks for looking.