Version update instructions: The changes in OCuP4v2 compared to OCuP4 are as follows: Add signal enhancement chip to comprehensively improve compatibility and support, and can support for /for /for series graphics cards. Supports up to PCI-E4.0 x4 running at full speed. Add ESD/ to protect the graphics card and hardware when using For TGX interface hot plug. Add a signal control circuit, For TGX interface or other models OCuLink interface supports synchronous and stop. A one-click button is added. Some models that report errors when starting and stopping simultaneously can use one-click to open the docking station and support synchronous shutdown. For TGX interface models, it is recommended to use OCuP4v2 For RTX40 series graphics card users, it is recommended to use OCuP4v2 Due to different batches, the appearance, color and printed words of the product , which not affect the use Material: Metal colour: black Package Contents: 1 x Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.