Promote the on-line community experience of the X-Box Live of the unprecedented in history, let you draw up the strategy with member of team, the interference opponent or while playing favourite game with the friend chat -- You can serve to record for friends or family and stay the speech message through the free X-Box Live letter, can also replace telephone and good friend contact -- Open loudly or adjust the small voice, make plersonally experience the most vigorous game career to make possible -- Frequency range: 20-20000 Hz -- Sensitivity: 5.4 + / - 5 dB -- Impedance: 32 ohms -- 2.5mm jack