what is the difference between qc20 and qc20i as you dont mention any compatibility for qc20.  are these compatible with any apple device.

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  • The previous answer is incorrect according to a search on the differences.The difference is the type of system. The 20 is closed, and 20i is open. Do a search to determine which is better for you. I can't believe that one or the other would be the only one "compatible" with iPhone! It's an audio jack! - Mark

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