Review on Bluetooth Waterproof Reduction Module Upgrade by Kelly Thompson

So far so good. Setup and connection were clearly described and ran smoothly. They are much lighter and slacker than my TRN BT20S. I paired them with my KZ ZAX and they sound fantastic! So far very happy with this purchase and for the asking price it's not a problem. UPDATE: Everything seemed to work fine at first, but after about a week of use they keep turning off, frustratingly. They became unreliable and eventually unacceptable. :( SECOND UPDATE: The seller suggested replacing with a new version. So far the connection is fine and everything is fine!