It's pretty good at Interstate speeds, but that's about it.

I have to listen with my phone and car volume all the way up, because otherwise I won't be able to hear it very well. When I am driving through town, I can hear an fairly annoying buzzing in the background of all of the songs. When I am driving on the interstate, the buzzing is mostly drowned out by the road noise, so it works pretty well for road trips (which is why I got it).

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