Pros below: Gorgeous sounds and complete freedom from wires - that's all you need to know about these headphones. A huge plus was the long battery life - it lasts up to two days in constant use (at work), and up to 90% is charged in a matter of minutes (30-40 minutes). Excellent noise reduction - even in the oldest Hong Kong metro trains, the environment and noise are barely audible, even when no music is playing in the headphones. Cons below: One of the sliding arms became slightly loose and began to move forward too easily. But this does not interfere with the use of headphones. The microphone is only partially suitable for talking - it picks up too much extraneous noise, and you have to raise your voice in order to be heard. But you donβt take these headphones for calls, right?