-Driver Unit: 40 mm Cobalt magnet
-Impedance: 32 ohm +/- 10%
-sensitivity: 93 dB +/- 3dB
-Frequency Response: 20 Hz - 20K Hz
-Active Noise Reduction: 12+/- 1 dB at 300 Hz
-Power Requirement: 1x AAA battery
-Battery Life: Up to 32 hrs(Active Noise Reduction only)
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