Beyerdynamic DT-109/M200/H50-B , Headset The DT 109 headsets, which are characterized by their robustness and ease of maintenance for years proven themselves in language teaching and in radio, television and film companies, especially in reportage, to cameras , sound and lighting consoles and intercom systems. @ + @ + High-quality hearing systems and a fully adjustable lip microphone with high noise Suppression guarantee outstanding speech intelligibility. @ + @ +, Headphones: dynamic, closed, close to the ears, Impedance 50 Ohm, Sound pressure 94 dB, Frequency range 30-20,000 Hz, Weight 390 g, Microphone: dynamic, Polar pattern: hypercardioid, Impedance 200 Ohm, Frequency range 40-12,000 Hz, Color: Black,