For Lenovo TGX interface models, it is recommended to use OCuP4v2 For RTX40 series graphics card users, it is recommended to use OCuP4v2 Version update instructions: The changes in OCuP4v2 compared to OCuP4 are as follows: Add ReDriver signal enhancement chip to comprehensively improve compatibility and support, and can support for Nvidia/for AMD/for Intel series graphics cards. Supports up to PCI-E4.0 x4 running at full speed. Add ESD/TVS to protect the graphics card and hardware when using For Lenovo TGX interface hot plug.<br><br>Add a signal control circuit, For Lenovo TGX interface or other models OCuLink interface supports synchronous start and stop. A one-click start button is added. Some models that report errors when starting and stopping simultaneously can use one-click start to open the docking station and support synchronous shutdown. Due to different batches, the appearance, color and printed words of the product may vary, which will not affect the use Material: Metal colour: black<br><br>Package Contents: 1 x Kit<br><br>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.