The Lenovo ThinkPad Pen Pro for X1 Yoga is an ideal input solution giving users 2048 levels of pressure for precise content creation. 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. This pen is unique to the ThinkPad X1 Yoga in that it can be stored in the system pen slot made specifically for that pen. While being stored, the pen will recharge and allow the user up to 130 minutes (active use) of battery life off of a single charge.Diameter: 6.5mmPressure sensitive: 2048 levels Battery: rechargeable battery in side for fast charge Could be stored and charged in ThinkPad X1 Yoga pen slot