The ThinkPad Pen Pro is similar in size and shape to an actual ink writing instrument. With 2,048 levels of pressure sensitivity, it is an ideal input solution to give users 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 touchscreen-enabled devices. There is a USB pen holder in the box so you can easily keep your pen attached to your ThinkPad system.