Works well with my true wireless headphones. But one of the few problems I've seen with it is that when it's in your pocket and there's something over it, like your hand, or when you sit down, the signal starts to drop. It could be headphones or an MP3 player, but I'm not sure. Another problem I've encountered is that you have to set up a playlist where you don't have to change the songs at all. I've noticed that if I start skipping a song but turn it on and go to the songs I want to listen to, the battery drains quickly if you do this from time to time. Otherwise, if you let it play directly from the battery, it will last a long time. In general, this will help you when you want to hear something. I play mine at work. It comes with a 32GB micro SD card so it's not bad for the price. Just wish the battery lasted longer when changing songs.
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