【Microsoft Pen Protocol】 Adonit ink Uses Microsoft Pen Protocol which has features: 4096 Levels of pressure sensitivity & Palm Rejection: Emulates pen feel. Write comfortably and naturally without worrying about extra marks from your palm on the screen. | 【No more Bluetooth pairing headache】Adonit ink is a standard Microsoft Pen Protocol (N-trig) Digitizer and does not require to be connected to Windows via Bluetooth. | 【Built-in shortcut buttons】two shortcut buttons allow you to erase and right click with ease. 【Palm Rejection】Rest your palm comfortably on the screen and lean in as you write or draw using this windows pencil. | 【Built-in Rechargeable battery】 No need to buy Battery any more. Spend more time creating. Easily recharge it with any Micro USB charger. 【Made in Taiwan】Our stylus made in Taiwan! so that means it definitely has quality and durability. | 【Microsoft Surface Series and More Devices】 Adonit ink is compatible with Microsoft Surface Pro3, Pro4, Pro5, Pro6, Go/ Go2, Book, Studio/2 and certain models of Asus, HP, and Dell tablets & 2-in-1 devices with MPP (Microsoft Pen Protocol). 【Industry Leading Warranty】When you choose Adonit, you enjoy the reassurance that comes with our stylus or parts warranty with 12-months!