Features Microsoft Surface Pro 512 GB And Its Specifications
I think you are referring to Microsoft Surface Pro 4 which is also available in 512 GB. It was announced to the public and released on October 2015 alongside Microsoft Surface Book. It ships with Microsoft Windows 10 Professional available in three different processor models:
Internal storage is available in the following capacities: 128 GB, 256 GB, 512 GB, and 1 TB. It measures 292.1 x 201.42 x 8.45 millimeters. All Microsoft Surface Pro 4 models run on 6th generation Skylake Intel Core processors which run cooler and more powerful than its Intel Core Haswell predecessors, which you can find in Microsoft Surface Pro 3 and Microsoft Surface Pro 2.
All models have continuous kickstand, Bluetooth 4.0 Low Energy, USB 3.0 port, magnesium casing with silver-colored back side, mini DisplayPort, Cover Port, Wi-Fi 802.11a/b/g/n/ac, microSD card reader, 3.5-millimeter jack, and a renamed port called “SurfaceConnect,” a port on the side for connecting wall charger, Docking Station, or Surface Dock accessories.