Features: This is the upgraded version TH3P4G3 , the Thunderbolt-compatible GPU Dock vedio card. If your laptop have Thunderbolt-compatible 3 or Thunderbolt-compatible 4 interface, you can use it to connect a external graphic so that to play- game,video editing,image processing and so on. It comes with SFX and ATX power holder, so that you can use it more convenient. Compatible with- most mainstream graphics cards supporting 60W reverse charging- The aluminum alloy shell- is solid, anti-interference and heat dissipation, and adopts all solid capacitor, which is safe, durable and stable. Specifications: Model: TH3P4G3 Thunderbolt-compatible 3/4 Speed: 40GB Material:Aluminum alloy shell Size:approx 166x91x28mm/6.53x3.58x1.1in Weight: 500g approx USB3.0 port extension, 5Gbps Power: ATX-/SFX-/FLEX-/other Thunderbolt-compatible: Max- 5V 3A Thunderbolt-compatible/PD: Max- 20V/3A (60W) USB 3.0: Max- 5V 2A Package Includes: 1 x TH3P4G3 Thunderbolt-compatible GPU Dock 1 x 0.5m Thunderbolt-compatible Data Cable 1 x 2m Thunderbolt-compatible Data Cable 1 x SFX Power Holder 1 x ATX Power Holder 1 x User Guide (not include GPU ) note: It does not support forMacbook with M1- chip. When you use MacOS- for Macbook-, it only support AMD-version graphic card. And when you use Windows-system for Macbook-, it only support Nvidia- version graphic card. The graphic card and power is not included!