The ultimate laptop. Now more powerful than ever. Incredibly powerful, meticulously crafted, and built for extreme performance, Surface Book with Performance Base is a revolution in laptop design. The detachable 13.5″ PixelSense Display is optimized for pen and touch. With the full power of a high performance laptop and the versatility of a tablet, Surface Book gives you everything you need to work with professional-grade software, anywhere you want. With a perfect mix of performance and versatility, this is the ultimate laptop.