ThinkPad Pen Pro-7 "The ThinkPad Pen Pro with up to 4096 levels of pressure sensitivityThe ThinkPad Pen Pro with up to 4096 levels of pressure sensitivity, provides a natural pencil-like and paper experience when you sketch and jot down notes. Users will also enjoy easy access to short-cut functions through two built-in customisable buttons on the base of the pen. This pen can also be conveniently stored and charged in the notebook's pen slot.