I have been using these over ear headphones for almost 5 days. I have never imagined active noise cancelling could be this perfect. Doing activities such as walking, running, even sleeping have become much more exciting with these beauties. Aside from its greatness, when you compare it to top active noise cancelling headphones that can cost $400+, there is definitely no sound quality difference between them and Cowin e7. Thank you for making the best headphone for such an affordable price. Overall, this is the greatest wireless over ear headphones, battery goes definitely more than 30 hours. Strong bass as well, used it for gaming too, amazing experience!!! You can skip&stop songs, answer calls using the button provided on the headphone.