http://www.gmb.nl/item.aspx?id=7724
|   Interface: USB 3.0/2.0/1.1 compatible 
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|   Sensitivity (at 1KHz) : 105 +/-3 dB 
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|   Impedance : 32 Ohm +/-15% 
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|   Speakers: 30 mm diameter, 16u mylar 
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|   Frequency response: 130 - 20000 Hz 
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|   Input power: 40 mW nominally, up to 100 mW max 
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|   Distortions: < 3 % at 1KHz 40mW 
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|   Microphone: condenser omni-directional; sensitivity:-58 ± 3 dB(0 dB=1V/uBar at 1KHz), -38dB (0 dB=1V/Pa at 1KHz) 
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|   Net weight: 0.2 kg 
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|   Cord length: 2 m 
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