Bose - QuietComfort Headphone

The headphones shown in the photo are the Bose QuietComfort 15 (QC15) Acoustic Noise Cancelling Headphones.

This model is a wired over-ear headphone known for its active noise cancellation.

Model details
Technology: Active noise reduction (Noise Cancelling), which is especially effective against monotonous noises such as aircraft engines or fans.
Power supply: The QC15 requires an AAA battery for operation (even for pure music playback).

Accessories in the image:
The original protective case, in which the earcups are stored with a 90° turn.
Two different cables (one with built-in microphone/remote).
An airplane adapter to connect the headphones to the in-flight entertainment system.

The model was marketed roughly between 2009 and 2013 and, due to its longevity, is still considered very reliable by many users.