The item shown is a PCIe GPU riser card (specifically a 1x to 16x powered USB 3.0 extender adapter card)
Key FeaturesType: PCI-E 1x to 16x riser adapter.Components: Includes a black adapter board with solid capacitors, a USB 3.0 extension cable, and a small 1x PCIe adapter piece.Purpose: Connects a graphics card (GPU) to a smaller PCIe slot on a motherboard via a flexible USB cable.