The panel-mount feature allows you to run this David Clark H20-10XP aviation headset from your aircraft's power source with the 5 foot coil cord. It is extremely comfortable, with its "floating" headband and ear seals that shield your ears from unwanted noise. The "best-in-class" M-7A electret mic has a flexible boom. You can also adjust the volume in either ear. The 22 dB passive noise reduction is amazing enough—but when you turn on the ENC feature you get 17 to 22 dB additional noise attenuation.