Battery-powered w/Bluetooth, Electret mic, Straight cord, Helicopter U-174 plug
Bose A20 Helicopter Headset

Features:
- Significantly greater noise reduction for pilots than currently available.
- Improved level of comfort achieved through choice of materials, distribution of weight throughout the headset, 1/3 less clamping force than most conventional noise reducing aviation headsets, and additional room for the ears.
- Clear audio for enhanced communications.
- Now available from Bose for the first time: Bluetooth® communications interface.
- Also included by Bose for the first time: auxiliary audio input.
- Priority switching so pilots can decide which audio source they want to hear.
- At least 40 hours of typical headset use from just two AA alkaline batteries.
- Made in the U.S.A.
- Meets or exceeds all TSO standards.
- All this, and these headsets still weigh only 12 ounces.