Microsoft Surface Pen for Surface 3 & Surface Pro 3 (Certified Refurbished) This Certified Refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, a minimum 90- Battery powered with 1 AAAA, two 319 coin cell batteries. Designed for Surface 3 & Pro 3; Connects to Surface via Bluetooth 4.0 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