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Title: headset hums at higher volumes
Review: this headset is very disappointing. setting the volume above the half-way mark results in an audible hum. increase the volume and the hum becomes a significant distraction. thinking that the unit was defective, i contacted plantronics customer support, but was told that this behaviour was to be expected.although it had the features i wanted and is compact, i recommend looking for another headset.
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