In my  experience with Bluetooth speakers and headsets with speech on a  computer, tablet, or phone, there's always a bit of  lag time. Also, parts of words are cut off.  In my opinion, such headsets and speakers work better with music, books, and podcasts than they do with synthetic speech.  I hope that helps.  
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Abbie Johnson Taylor, Author https://abbiescorner.wordpress.com

http://www.abbiejohnsontaylor.com

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