I received very quickly the next day to tell the truth, and I am quite happy, usb connector offers better sound quality than my sound card integrated, the sound quality of the headphones is decent for its price.
I find only 2 default to him, the fact that it is preventing sudden turn put our heads against the armchair eg file and usb swimming a bit, making planting the games if it moves, see even plant linux.
But I do not regret this purchase, this helmet is really great