I use this to pair my noise canceling headphones and UV5R portable radio, although I wish the speakers were a bit smaller with a slight modification to each of the headphones. It has succeeded in connecting these speakers to existing speakers and both units work great. Increasing the noise in the Ear Pro actually increases the volume and clarity of the radio stream (which was good), and I still have an aux jack on the Ear Pro for my phone if needed. Weatherproof connectors, noise-cancelling microphone, and longer cables are ideal for outdoor use. So far this has been a great cheap and more versatile option than the more traditional setup for my application. If it works so well for an unintended use, I can't see it's a bad option for what it's supposed to be. Arrived on time, it doesn't look like cheap hardware, but it doesn't feel like cheap junk by any means.
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