I had this specific card in a set with a microphone that I had bought and I'm telling you the truth, I have been using it every day. I connect it from my PC to an amplifier and whatever party we have, I bring it and use the microphone for fun. Only one friend bought it and he didn't open it to a point where I say it's broken... after 10 minutes of charging, it played perfectly. He has also connected it with a wireless RF microphone. Also, I want to tell you that it has Bluetooth! So you can play it on any sound system you want, from mobile to tablet. It's worth it, guys!

The first device never worked...
After replacing it... the second one had to charge for over an hour to start working...
Although it has a USB, it cannot be connected to a computer... the USB is only for charging.
I don't know how long it will last...
I used it once for 2 minutes just to see what it does...