the Surface Pro 4 Type Cover is thinner and lighter than before with improved magnetic stability for lap use. It also has a mechanical keyboard with optimal key spacing for fast and fluid typing, plus an enlarged trackpad for precision control and navigation. Leave passwords in the past. Log into your Surface Pro 4 with one simple tap using the Surface Pro 4 Type Cover with Fingerprint ID. No more wasted time. Store all of your passwords in one place with Microsoft Passport and use your fingertip to perform actions like purchasing an app from the Windows Store, all thanks to the convenience and security of Windows Hello. Work the way you want.