HEADSET SPECIFICRTION DRIVER UNIT (MM) 40MM NEODYMIUM MAGNET CHANNEL VIRTUAL 7.1 SURROUND FREQUENCY RESPONSE 20 HZ to 22 KHZ IMPEDANCE 32 OHM SENSITIVITY 97 +/-3DB MICROPHONE SPECIFICRTION MIC NOISE CANCELLING YES MIC FREQUENCY 100HZ to 10 KHZ MIC IMPEDANCE < 2.2K OHM MIC DIRECTIVITY OMNI-DIRECTIONAL MIC SENSITIVITY -54 +/-3DB Item Dimension (L inchxW inchxH inch) 9 x 11 x 5