Whether You're Working from a Cramped Airplane Seat or Need to Type with Your Keyboard in Your Lap, Detach Surface Pro Flex Keyboard and Stay in Your Flow. Attach This Keyboard to Your Pro to Type as You Would on a Laptop, And Dock Surface Pro to a Monitor to Create a More Ergonomic Workspace. Enjoy Peace of Mind When You Use This Keyboard Detached With 41 Hours of Continuous Typing. When You Need to Recharge, Simply Attach Back to Your Device. Sketch And Write Naturally on the Screen with Surface Slim Pen, Always Ready and Charged in The Keyboard's Storage Tray.