For Microsoft Surface Pro 6543 Go Book Bluetooth 4. 0 Stylus Pen 1. The stylus with an aluminum shell is more like a fountain pen than a traditional stylus, allowing you to get a more realistic handwriting experience. It has more than 250 levels of pressure sensitivity and Palm B1ock technology, you can write and draw without worrying about your hand position. 2. No need to worry about flashes of inspiration. Just one tap of the stylus instantly opens a blank OneNote document on the screen, whether your tablet is locked or hibernating. All notes you write will be saved. 3. Use the right-click button on the side of the stylus to bring up formatting options. The clear button turns the stylus tip into an eraser, so you can revise your notes as you take them. 4. The two buttons on the pen barrel are made of soft rubber and have a large button area, which can be easily operated during writing. 5. The button on the top of the pen barrel is a button completely independent of the stylus, because it uses an independent power supply, even if the pen cap is removed, it can work independently. Under normal circumstances, pressing this button can quickly start Surface Pro 3 pre-installed OneNote. Specification:1. Compatibility: Surface 3, Surface Pro 3, Surface Pro 4, 256 levels of pressure sensitivity and Palm Block technology (256 pressure sensitivity is only for Surface Pro 3 stylus)2. Interface type: Bluetooth 4. 03. Pressure sensitivity: 256 levels of pressure sensitivity4. Buttons: Right-click and Clear5. Dimensions: Diameter: 9. 5mm Length: 135mm +-1mm6. Weight: 20g +- 2. 0g