This is a panel mount aviation headset for helicopter pilots. It has a 5 foot coil cord that can run off your chopper’s power source. The M-7A noise canceling electret mic is the best on the market-it allows for clear, crisp communication. The ENC technology increases noise cancellation by up to 22 dB when turned on. You might forget you have the headset on due to the super-soft double foam headband and comfort gel ear seals.