This is a Thunderbolt 2 model. This is a really great unit if you are a heavy UAD user and use a lot of their plugins and want to keep your host CPU free for other processing. Many of my plugins are now native so I do not require as much DSP processing. The image of the box is my other unit (Thunderbolt 3 model) as i do not have the original box for this particular unit. This is the Thunderbolt 2 model, so please check compatibility with your own setup before purchasing, especially if you are on a recent Windows Thunderbolt based machine. It should work on any Mac with Thunderbolt (I have an M1 Pro). It comes with an Apple Thunderbolt 2 – 2 cable, as well as the original power supply. Condition overall is pretty good, just a few marks on the unit under light but everything works as expected. Any questions just ask.