Califone Titanium HPK-1030 Headphones with Boom Microphone: * Dual 3.5mm plugs * Thick, detachable 6" cord * Frequency response: 20Hz - 20kHz * Impedance: 50 ohms * 40mm neodymium drivers * Adjustable uni-directional microphone * Soft, comfortable ear cushions * Comfort strap * Adjustable headstrap * Earcups with high passive ambient noise rejection * In-line volume control * Sentinel switch restricts volume to 85 dB * Protective slotted baffles * Rugged construction