iFrogz Caliber Vanguard Premium Gaming Headphones with Microphone - Black Retractable mic 7.1 surround sound Vibrating bass driver Closed-ear design Driver Unit: 40 mm neodymium/Impedance: 32 ohms/Sensitivity: 95 dB +/- 3 dB at 1 kHz/Frequency Response: 20 Hz to 20 kHz/Cord Length: 2 m. Connectivity Technology: Wired USB