Top sound when connected via USB, an honest tangible 3D sound effect (not only around, but also from above / below), good ergonomics, head position tracking, materials - although not expensive, but of high quality. You can connect via Bluetooth to a computer or phone, but keep in mind that the adapter must have Bluetooth version 4.0 or higher, otherwise the sound will be worse, but even with a good adapter, it is preferable to connect via wire (to a PC) if you want to use it for games so that there is no lag and there is 7.1 sound. With phones, everything is easier - good bluetooth modules are built in and the sound quality is decent. As for head tracking, it's extremely useless for a phone, but very interesting when connected to a PC. When you sit in front of the monitor, the source of visual information is in front of your eyes, thanks to tracking, the sound picture does not move with your head, but remains in place, which makes it much easier for your brain and you, from time to time, can even forget that on you are wearing headphones, which is why, despite the impressive size and weight, the head does not get tired of them, even during long sessions. Well, when, in some dynamic game, everything starts to sound around you, you generally forget where you are. The 3D effect itself is also very good, you clearly understand exactly where and at what distance the enemy is from you, even behind your back. Also, in the Audezee HQ program, you can assign keys to head movements and use them in the game - for example, in Dishonored 2, I put the keys responsible for peeking around the corner on head tilts to the left and right - this turned out to be very convenient and works great for immersion . All headset settings are stored in it and there is no need to launch the application every time (except for cases with key assignments)