Hello, Negative: - Noise Reduction Earphones sensitive to electromagnetic waves (in a bus in my case). It's downright rude: no need to reduce outside noise if to create new sounds (like "mosquito in her ear") - Cables sensitive to friction (clothing or skin) which also causes additional noise (so I recommend the headset to make jogging). - My model had also at times of micro-coupuresde noise reduction (model defective?) - The control box with battery, light weight, seems weak (battery compartment)
Positive: - No parasites against at home when sitting next to ub computer, noise reduction works well and removes the sounds of the PC fan. There remains a breath but this seems to conventional noise canceling headphones that I could have or tried (the Bose QuietComfort 300 20i also has a breath) - Battery life of 60h - Good sound (lorsq'il are no parasites or bus)
Overall I was very disappointed with these headphones because they do not satisfy me, pity ...
