Surface Pen,PAC DOT Active Surface Pen for Microsoft Surface3,Surface Pro 3 and Surface Pro 4,Surface Book/Studio 4096 Levels of Pressure for Writing, Drawing or Painting with Eraser (Gold) 1. The pen works with any device using Windows INK with MPP protocol. 2. 4096 Levels of pressure for high-fidelity writing: Pen responds to the pressure of your hand precisely.Sketch, write, and erase naturally with no perceptible lag between the Pen tip and your line  just like you would on a sheet of paper. 3. Erase and right-click button built in pen, please keeping press the Erase button when you need use it. 4. The pen comes with 2 types of Tips, Soft and Hard. Soft tip suit for no screen without protector, Hard tip suit for screen with protector, They can be removed and replaced by using the included Tip Replacement Tool. 5. 12 Months Warranty by LinkS.NOTE:Any questions please do not histate to contact us by email:(linkscs01@foxmail.com),We will try our best to solve problem for you.Thank you: )Please make sure your device is Microsoft Surface Pro 4 or Surface Pro 3 before you place an order.Please do not leave negative review for our item,any questions please do not hesitate to contact us,We will try our best to solve problem for you.Please do not worry!!