Title: Don't waste your money!
Review: The microphone input on my Koss dongle never worked, and the output worked only briefly before dying. Moreover, the output sound was not as good as that from the headphone output on my MacBook Pro. After one use with my headphones, the device is now completely dead. So my rating is really zero stars. I'm glad that it seems to work for some, but I had no luck with it.
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