Sennheiser PXC550
Wireless Headphone 

Create intimate space in the most chaotic of environments with Sennheiser's NoiseGard Hybrid adaptive noise cancelling technology.
With unrivaled speech clarity for personal and business calls, the PSC 550 Wireless identifies and filters out unwanted ambient noise. 
Touch Sensitive Trackpad - Integrated into the earcups they give you complete control on the move, from volume control to skipping a track to taking a cool-all with the swipe of a finger
Built-in limiter - The PXC 550 Wireless has a built-in limiter that avoids sudden and extreme sound level peaks, e.g. when you are connected to an inflight entertainment system that is also used for crew announcements.
Lightweight headsets designed for long listening sessions, and for people on the move.
Fold Control - The PXC 550 Wireless seamlessly anticipates your needs by powering on as you unfold it, automatically pausing your track when you remove it and switching off when you fold it away
The PXC 550 Wireless boasts extraordinary battery life of up to 30 hours of continuous use
Included : Cable with inline remote control, carry case, USB Cable, IFE adapters, quick setup and safety guide

Specifications
Wearing Style : Headband
Impedance : Active 490 Ω / Passive 46 Ω
Frequency response (Headphones) : 17 - 23,000 Hz 
Bluetooth Version : Bluetooth 4.2 
Sound pressure level (SPL) : 110 dB 
THD, total harmonic distortion : <0.5% (1kH, 100dB) 
Contact pressure : 3 N 
Ear coupling Circumaural
Charging time : 3 hours (full charge)
Operating time : Up to 30 hours 
Weight w/o cable : 227g