Microsoft Classroom Pen 2 - 2 buttons - light gray, platinum (pack of 20) - for Surface Go, Go 2, Pro (Mid 2017), Pro 4, Pro 6, Pro 7, Pro 7+ — Protected Trust
Identify your Surface Pen and features - Microsoft Support
uwp - How to detect pen button press and release events - Stack Overflow
Surface Pen with two buttons on the side and WIP build - Microsoft Community
Amazon.com: Stylus Pen for Microsoft Surface,with1024 Levels High Pressure Sensitivi Compatible with Surface Pro X/8/7/6/5/4/3, Surface Book 3/2/1, Surface Go3/2/1, Laptop4/3/2(Silver : Electronics
Smart Stylus Pen 2048 Pressure Level Sensitivity Customized Shortcut Button for Surface Pro 3 4 5 Laptop Tablet - AliExpress
Amazon.com: Pen for Surface, Stylus Pen for Microsoft Surface Pro X/7/6/5/4/3, Surface Book 3/Laptop 4/Studio 2, Surface Go 3/2/1, Surface 3, Palm Rejection Stylus Pen, 1024 Pressure Sensitivity (Silver) : Everything Else
Three Button Pen for Drawing Tablets | Xencelabs Official eStore
Genuine Stylus Pencil for Microsoft Surface Pro 6 7 8 Laptop Write Pen Notebook Bluetooth-Compatible with Screenshot Accessory - AliExpress
Amazon.com: RENAISSER Stylus Pen for Surface, First Soft Tail & Barrel Dual Eraser, USB-C Charging, Made in Taiwan, 4096 Pressure Sensitivity, Compatible with Surface Pro 8/7/Laptop Studio/Go 3/Duo 2, Raphael 530 :
Amazon.com: Microsoft Surface Pen for Surface Pro 4 (Silver) : Cell Phones & Accessories