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Specifications .Style: On-the-Head .Speaker: 40 mm .Frequency range: 20 Hz-20 kHz .Impedance: 32 Ohm .RMS: 50mW .Sensitivity: 102 dB .MIC sensitivity: -50 dB .Cable length: 2 m .Plug: 3.5mm .Controller: Volume knob on the headset Package Contents: HS-19 headset