Beyerdynamic DT-108/M200/H400-B - one-ear headset. Headphone: dynamic, closed back, circumaural, 400ohm impedance, 94dB pressure level, 30Hz-20kHz. Microphone: dynamic, hyper-cardioid polar pattern, 200ohm impedance, 40Hz-12kHz. Cable not included (please order separately). Colour: Black. Weight: 283g