Razer Battlefield 4 Razer BlackShark Over Ear Noise Isolating PC Gaming Headset (RZ04-00720300-R3U1) (Certified Refurbished) The design of the Razer BlackShark was inspired by aviator headsets worn by attack helicopter pilots. They provide the same level of comfort needed to endure extended mission times and superior sound isolation for absolute command-clarity. With the circumaural design and leatherette sealant of the headset's ear cups, block out all unwanted, ambient noise and only hear the awesome, intense audio of your games and music. The Razer BlackShark's detachable boom microphone makes this a highly versatile headset, at home both at a gaming setup and out on the streets for music playback. Drivers: 40mm neodymium magnets with copper-clad aluminum voice coil Headset: Frequency response: 20Hz  20KHz / Mic: Frequency response: 50Hz  16KHz