The speakers are very tight around the head - too tight. You barely notice the 7.1 surround system in the tests that the application uses. The article says that this device has active noise but it is false information. This unit has no such function.
The cord is removable when the headphones and to control the volume with the scroll button at the left ear hive. If you use USB you get problems if you also use speakers.
The unit has lights that can be programmed on the software, but the pulse function (which is clearly the coolest) can not handle darker light but can only pulsation in bright light and flash in dark light. It also has two magnetic lid locked on the sides that you can pick from. At first I thought that was where the microphones sitting but that is not the case, but connected to the two clear plastic pieces that seem to serve no function. The headphones are prettier with caps on in my opinion.
I have not had any problem with the software but it comes with no CD or instruction manual for this product so you have to navigate to Logitech's own website and download their software for headphones.
If you have a gaming PC would be well that the light should be barely noticeable during the day and unobtrusive during the night so as not to get distracted when gamear.
It is a good pair of headphones that blocks the sound quite well in comparison to my previous headphones (Kingston HyperX Cloud Gaming Headset white), but it comes at the price of a bit of comfort.
The ear cushions seem to be interchangeable but it included no more than they are already wearing the headphones, which its surface appears to be made of some kind of synthetic cotton material with good friction. However, the balance of the headphones and seems to be a little tail heavy so it's pretty easy to headphones go too far back. One can also angle about headphones 85 degrees to themselves so that they can rest more comfortable on the shoulders, but I think mainly the function is unnecessary when the tight spacing between the covers mean that they should rest right crowded anyway.
Unlike my previous headphones then the bit that holds together the covers made of plastic, and therefore feels the headphones right "flimsy" in comparison with metal pieces that I had on my previous headphones.
I feel sorry for the people who paid more than 1000 SEK for headphones, myself, I paid ca. 900 SEK, and I think it's a better price for this product, despite the fact that these headphones have interesting features, I recommend that people buy (Kingston HyperX Cloud Gaming Headset) instead of these if people are desperate for 7.1 surround sound.
That said active noise cancellation, this unit has not!