The Razer Core X is an external enclosure for your graphics card (eGPU) that boosts gaming experience by enhancing graphical performance. The good thing about this external GPU is that you can just plug it in and not worry about a more complicated setup to achieve enhanced graphical performance, in case inserting an actual video card into your laptop or another system is not possible. The device is used but fully-functional. Cosmetically, it is in very good condition with some minor signs of wear that only really show at specific angles under light. It includes a Thunderbolt 3 cable and an NVIDIA GeForce GTX 970 graphics card. I replaced the thermal paste on the graphics card last month, so it runs much cooler than a normal used graphics card. More information can be found at Razer's website: $350 cash please. Can meet at SLAC campus, Stanford mall, or Stanford campus.