Hama h-51669 usb headphones

Hama h-51669 USB headphones - the computer does not see at all. Even the dispatcher does not have it.
There is no click or noise when plugged into the USB port. I disassembled the control box. Search for the schematics of the scarf did not give any results. It is also impossible to disassemble what kind of microcontroller there is. Obviously, there is a defect in the marking at the factory.
Help determine who has in stock hama h-51669, the brand of the controller. And if there is a scheme, it is even better.
The box is easy to open - you can easily see the brand of the controller.
Thanks: help: