I have been using the JBL daily for over a month now while jogging or cycling, no problem at all. I have now also started using them in my free time.... Are they serious that you can't use the left one separately???

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Accepted Answer

That was also the problem with me. According to JBL, the right InEar is the master.
The left one alone does not work.

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I got the Urbanista London for my partner - parts for 99.
Super alternative

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Question about JBL Reflect Flow

I have been using the JBL daily for over a month now while jogging or cycling, no problem at all. I have now also started using them in my free time.... Are they serious that you can't use the left one separately???