At a size of 9.5mm, the Lenovo ThinkPad Pen Pro provides users with the same shape and feel of an ink writing instrument. With 2048 levels of pressure sensitivity it is an ideal input solution for a precise content creation experience. Users will also enjoy easy access to integrated right and left click buttons that provide additional tools for data interaction. A USB Pen Holder is included with each pen for an easy way to store and carry the pen with you all the time. Powered by an AAAA battery, the Active Capacitive Pen is designed to provide a premium pen experience. It is compatible with the following list of systems: ThinkPad X1 tabletThinkPad P50ThinkPad P70ThinkPad Yoga 460ThinkPad P40ThinkPad Yoga 260ThinkPad X1 YogaThinkPad S1 Yoga 12ThinkPad Yoga 14ThinkPad Yoga 15ThinkPad 11eThinkPad 10ThinkPad Helix