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Comes with a USB small sound card (nothing special, just a connection for micro and headphones) because the Micro is a phantom, need some electricity to work and is getting it from the USB.
Til now work ok, people hear me clear and the arm, even if smaller as I thought still work as intended. Of course it is a cheap version, you should be careful because the materials are not the best, if you know what I mean. But do the works perfectly for the price.