This is an upgraded version of WKGL17C50, compatible with for Thunderbolt's GPU Dock. If your laptop has a Thunderbolt compatible 3 or Thunderbolt compatible 4 interface, you can use it to connect external graphics for gaming, video editing, image processing, and more. It is equipped with an ATX power socket, making it more convenient for you to use. Note:It does not support for Macbooks with M1/M2/M3 chips.When you use MacOS for Macbook, MacOS does not support Nvidia version graphics cards. When you use bootcamp to install a Windows system on for Macbook, it only supports Nvidia version graphics cards. Please install the latest version of the W11 system.The WKGL17C50 and WKGL17C100 models do not support the use of MacOS for Macbook Specifications: 1. Model: WKGL17 2. Compatible with for Thunderbolt 3/4 3. Speed: 40Gbps 4. Aluminum alloy shell 5. Size: 182mmx180mmx165mm approx 6. Weight:600g approx 7. Power supply: ATX 150mm x 140mm x 86mm 8. Note: Compatible with Thunderbolt: up to 5V 3A9. It does not support ports for Thunderbolt 1 and for Thunderbolt 2 Colour: black Material: PC+metal Note: Due to different product batches, the appearance may be different, which does not affect use. Package Contents: 1*GPU Dock Kit(Cord length: about 50cm) / 1*GPU Dock Kit(Cord length: about 100cm) / 1*GPU Dock Kit(Cord length: about 150cm) 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.