Item Type: Stylus Pen Material: Aluminum Alloy Pressure Sensitivity: Level 1024-4096 Button Function: Eraser + Right Button Color: Black, Silver Battery Type: 1xAAAA Alkaline Battery ( Delivered Without Battery) Applicable Models: For Surface 3 For Surface Pro3 For Surface Pro4 For Surface Pro（2017） For Surface Pro5 For Surface Pro6 For Surface go For Surface BooK For Surface laptop For Surface Studio 1、Applicable Models: For Surface 3, for Surface Pro3, for Surface Pro4, for Surface Pro (2017), for Surface Pro5, for Surface Pro6, for Surface go, for Surface BooK, for Surface laptop, for Surface Studio.  2、Smart Buttons: The auxiliary function makes the operation convenient, the "Eraser" button is used to modify and clear traces, and the "Right Mouse Button" is used to quickly select the menu content to improve work efficiency.  3、Pressure Sensor Function: Using sophisticated production technology, with the same pressure sensor function as the original pen.  4、Rich Pressure Points: This stylus pen has rich pressure points for a unique drawing experience and is easy to use.  5、Accurate Response: This stylus pen responds instantly for accurate and lag free writing reproduction.