With 2048 levels of pressure sensitivity, the Lenovo ThinkPad Pen Pro for Yoga 460/P40 it is an ideal input solution for precise content input and 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 Yoga 460 and P40 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: 6.5mm Pressure sensitive: 2048 levels Battery: rechargeable battery in side for fast charge Could be stored and charged in ThinkPad system