" 50mm full-bandwidth drivers fit around ear to block out external noisebr In-line amplifier with game and chat volume controls Separate chat game volume controlbr Durable braided cloth over wiresbr Mic mute switch Bass Boost switchbr Headphone Amplifier Stereo DC-coupled 35mWch THD 1 Frequency Response DC - 30kHz Condenser Microphone Frequency Response 50Hz-15kHz Speaker frequency response 20Hz-20kHz 120dB SPL 1kHz br Turtle Beach Call of Duty: Black Ops II KILO Limited Edition Stereo Gaming Headset"