The Bose Bluetooth ProFlight Series 2 Aviation Headset is the industry’s smallest, quietest and most comfortable active noise cancelling aviation headset. With an on-head weight of 4.5 ounces (128 grams), the new Bose ProFlight Series 2 Aviation Headset is designed for long term comfort and is Bose's most innovative aviation headset. Engineered for pilots of moderately noisy, pressurized turbine powered aircraft, it incorporates more than 30 U.S. utility and design patents.

Please Note:

The Bose ProFlight 2 Headset is intended for quieter pressurized / turbine aircraft with relatively low to moderate aircraft noise.
These are not intended for use in piston-powered General Aviation aircraft.
Key Improvements:

A thinner, lighter and more flexible cable
Improved low-mode noise cancellation
Winglets on the mic boom to assist in correct mic alignment and adjustment
Updates to the 'tap control' for talk-through to reduce the chances of inadvertant activation
Improvements to the carrying case for easier storage and transportation
Highlights:

On-Head Weight of 4.5 ounces
Digital Active Noise Cancellation
3 levels of user selectable active noise cancellation, now with improved low-mode
Updated tap control Talk-through for communication with those outside of the intercom
Full function Bluetooth® connectivity to mobile devices, audio sytems and EFBs.
Audio prioritization allows users to mix Bluetooth audio with intercom audio or to have intercom transmissions temporarily mute Bluetooth
3 Sizes of ear tips
Multiple plug types

Get more info : https://www.youtube.com/watch?v=m5Q0BhdfVFQ