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Hands Free Telephone Headset with RJ11 Telephone Plug.
The RJ11 plug only has to be placed in the telephone and the headset is ready for use. The headset is equipped with a sensitive and clear microphone with noise reduction and is very comfortable to wear.
Driver Unit: 30mm
Speaker Impedance: 32ohm ± 15%
Speaker Sensitivity: 97dB ±3dB
Speaker Frequency Response: 20-20.000 Hz
Maximum Power Input: 40mw
Microphone Operating Voltage: 4.5V
Microphone impedance: 2.2 K
Microphone sensitivity: -58dB ± 2dB
Microphone Frequency Response: 30-16.000Hz
Cord Length: 2.2 meters
Plug: RJ11 S
RJ11 plug: 
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