I have the headphones for 2 months already in use, after my Sennheiser MM400 have now come unfortunately lost. The headphones are circumaural, sitting very comfortable, which was not held at this price point possible. The pairing with my Nexus 5 and my iPod touch 4G works fine. I'm not an audiophile man and therefore can only say that the headphones sound very good for me and I am sound nothing to complain about. The indicator LED flashes in operation every 6 seconds blue, what you can not switch off and is a bit annoying, if, as in my case, in a coach at night on the road. The battery lasts felt about 9 hours, which is difficult in order. It is included on cable 3.5 mm jack to also recover the headphones can still, if the battery should be empty a 3.5 mm jack. Whether the headphones also work on Windows 7, I do not know, because I have bad experiences collected so with my MM400 already, but this was due to Windows and not the headphones. The built-in microphone works okay. The battery can not expand it, but I did not find bad. The volume control, you can press and then go to the next track, press twice for the previous song. The period in which the two pressures must be done for this has unfortunately chosen to be somewhat short, so I jump frequently two songs forward, instead of backward. For the price, the headset is highly recommended!