- 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 experience plersonally the most vigorous game career to make possible - Frequency range: 20-20000 Hz - Sensitivity: 5.4 +/- 5 dB - Impedance: 32 Ohm - 2.5mm jack