Item Type: Tablet Stylus Pen Material: Aluminum Alloy Pressure Sensitivity Level: 380 (N Trig Technology) Button: 2 Function Buttons Colour: Black Battery Type: 1 x AAAA Alkaline Battery (Not Included) Applicable Models: For Microsoft 3 Pro 3, for 4 Pro 4 5 6 7, for Book 1、Applicable Models: Stylus, exquisite workmanship, universal stylus for Microsoft 3 Pro 3, for 4 Pro 4 5 6 7, for Book.  2、High Sensitivity: Digital pen adopts N trig technology, 380 level pressure sensitivity, high sensitivity and professional stability, glossy writing, convenient for you to use.  3、Wireless Connection: Better wireless connection, you don't need to connect via bluetooth, just plug in the battery and it will work immediately.  4、HD Wood Nib: Made of aluminum alloy, wear resistant and durable, HD wood nib, smoother and more accurate, longer working time.  5、Function Keys: Touch screen stylus pen with right click and erase buttons, similar to the original pen, but without buttons on top.