Very comfortable
Effective, stress-zapping Anc
Excellent wire less performance
Up to 20 hours battery life this headphones
Cons-
Poor sound quality when non powered
Low tech headphones offer better sound
Only two cons this
In addition there is huge difference in sound quality as ANC is switched on and off , which is the real boon.
When using this wireless headphones you can control volume and music playback vait control on the right cup . This uses standard bluetooth canmands. It works with just about any current smartphone.
Its very best headphones.