Stereo headset with rotating microphone boomPractical in-line volume control Large comfortable ear cushionsComfortable, adjustable headband3.5 mm combo stereo + microphone jack for mobile phones Connector: 2 x 3.5 mmSensitivity (at 1KHz) : 105 +/-3 dBImpedance : 32 Ohm +/-10%Frequency response: 20 - 20000 HzDistortions:  3 % at 1KHz 40mWMicrophone: omni-directionalNet weight: 0.2 kgCord length: 1.8 m