Bose&reg; A20 Aviation Headset (Battery-powered w/Bluetooth, Electret mic, Straight cord, Helicopter U-174 plug) Redesigned pilot headset delivers comfort, stability and approximately 30% greater noise reduction than conventional noise reducing aviation headsets Provides greater comfort and stability, with more room for your ears Auxiliary audio input for GPS and other devices Bluetooth mobile phone connectivity lets you receive calls wirelessly without removing headset Meets or exceeds all FAA and JAA TSO requirements