Professional Headphones with Headset Microphone (Black) Professional Headphones with Headset Microphone General Features: Black color Padded headphones Speaker: 40 mm dynamic type Impedance: 32 ohms Sensitivity: 96 db&#177; 4 db Frequency: 20 - 20000 H Max. Input power: 100 mW Volume control dial Cord length: 5.91 feet (1.8M) approximate Headset Microphone: Condenser Type Headset Microphone Omni-Directional polar pattern Sensitivity: -40 dB &#177; 3 dB