The razer carcharias is a circumaural gaming audio headsetdesigned for extended hours of gameplay with superior gaming audio clarity and bass. The razer carcharias is a complete and comfortable gaming communications package that gamers can wear for hours on end. * frequency response: 20 - 20 000 hz * impedance: 32 ? at 1khz * sensitivity (@1khz 1v/pa): 102 4db at 1 khzmax. * input power: 200 mw * drivers: 40 mm with neodymium magnets