Microsoft Surface Pro 4 features a 6th generation Intel Core M processor, 128 GB of storage, 4 GB RAM, and up to 9 hours of video playback 12.3-inch Pixel Sense Display was made to be viewed, touched, and written on (Surface Pen sold separately) Featuring Windows Ink, a way to naturally capture notes at the speed of thought – with no need to be logged in Windows Hello is the password-free sign-in that gives you the fastest, most secure way to unlock your device Windows delivers comprehensive security including anti-virus, firewall, and anti-phishing technologies for the supported lifetime of your device. Surface Pro 4 runs Windows 10 Pro flawlessly.Also runs all of the professional-grade software you need, including Adobe Creative Cloud, Citrix, AutoCAD or Visual Studio. Maximum Memory Capacity : 4