Recertified Turtle Beach Ear Force X41 XBOX 360 Gaming Headset Factory refurbished with warranty 50mm diameter speakers with neodymium magnets Digital Wireless RF carrier reception (2.404-2.476GHz) Frequency Response: 20Hz - 20kHz, &gt;120dB SPL @ 1kHz Condenser Microphone Frequency Response: 50Hz - 15kHz