Used a larger 13-inch, 2,880x1,920-resolution one. It also has a refresh rate up to 120Hz for a smoother inking experience. Microsoft also introduced the Surface Slim Pen 2 with haptic feedback to help you take advantage of it. The default is 60Hz, though, so you don't drain your battery when you don't need it. Battery life is up to 16 hours, Microsoft said in its announcement.