Microsoft Surface Pen for Surface Pro 3 (Certified Refurbished) This Certified Refurbished product is manufacturer refurbished, shows limited or no wear, and includes all relevant accessories plus a 90 days limited hardware warranty. Compatible with Surface 3 and Surface Pro 3 - Connects to Surface via Bluetooth 4.0 Battery powered with 1 AAAA Included Palm Block technology ignores the pressure from your hand when it senses you're using Pen With over 250 levels of pressure sensitivity, Surface Pen lets you draw and paint with artistic precision