iFrogz CAL-STEALT Caliber Stealth Mobile Gaming Headphones with Mic, Black Retractable mic Deep bass, smooth mid-tones and crisp highs Closed-ear design Soft Rubber cord Driver Unit: 40 mm neodymium/Impedance: 32 ohms/Sensitivity: 100 dB +/- 3 dB at 1 kHz/Frequency Response: 20 Hz to 20 kHz/Cord Length: 2 m