Microsoft Surface Book (512GB, 16GB RAM, Intel Core i7) (Certified Refurbished) This Certified Refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The resulting product includes all relevant accessories, comes with a minimum 90-day warranty, and may arrive in a generic box. Only sellers who meet a high performance bar may offer Certified Refurbished products on Amazon.com 13.5" PixelSense touchscreen display (3000 x 2000) resolution Windows 10 Pro operating system Incredibly mobile at 3.48 pounds Surface Pen included.