The ThinkPad Pen Pro is similar in size and shape to an actual ink writing instrument. With 2048 levels of pressure sensitivity it is an ideal input solution to give the user a precise content creation experience. Users will also enjoy easy access to right and left click buttons built into the shaft of the pen that provide additional tools for data interaction. Powered by an AAAA battery, the Pen Pro is designed to provide a premium pen experience with ThinkPad touch screen enabled devices. There is an USB Pen holder in the box, you could easily to keep your pen attach to your ThinkPad System.