Passing the X31 model I sold and enjoyed in the X42, well that's a choice I do not regret (If I regret greatly, read on). It is even lighter and you will not tire after several hours of play. 7.1 The sound is extraordinary and makes the immersion of the total game. You hear a fly flying (type game MW3), not an enemy get behind, all sniper bullets, even those from more than 300 m. Same for the chat, you hear great friends and partners without forcing the voice, the two volumes are individually adjustable. It connects easily with a USB jack on the Xbox provided (WiFi box) and an optical cable also provided for the sound, then you just have to connect your headset to the controller and go. The remainder being wireless. I highly recommend (anymore at all). The had to 110.00 euros instead of 200 euros. By cons fails after a few months (I am the 2nd, always the same failure), recurrent failure being that you no longer have his game, but the audio chat. Your helmet becomes useless, so I strongly advise against this purchase.