Peace, mercy, and blessings of God be upon you.
For sale: Fosi sk02.
The problem with the card: The 3.5mm headphone jack in the front is broken, but you can use the one in the back and it works fine.
The buttons on top are broken and don't press, but they are useless anyway. It works fine, and if you want to fix them, go to the nearest electronics store and they will fix it.
Price: 250
Reason for selling: Upgrading.
Honestly, the card is excellent for my DT 990 pro 250 ohms headphones.