The product is a genuine Microsoft Windows 8 Pro operating system in full version, 64-bit DVD format with a product key and Certificate of Authenticity (COA). It is designed for use with one device and has minimum requirements of 20GB of hard drive space and 2GB of RAM. The operating system is in English language and is compatible with Windows operating systems. Made in the United States, this product from Microsoft offers a reliable and secure operating system for your computer or tablet.