Built for productivity, the HP Pro Book 450 delivers the performance & security features essential for today’s workforce. The sleek & tough design provides professionals a flexible platform to stay productive in or out of the office Processor Intel Core i 5-6200U 2.3 G Hz Turbo boost up to 2.8 G Hz 3MB Cache Dual Core Memory 8GB DDR4 2133 M Hz RAM Hard Drive 256GB M2 SATA SSD Optical Drive None Software Operating System: Windows 7 Professional 64 (available through downgrade rights from Windows 10 Pro 64) This system is preinstalled with Windows 7 Professional software & also comes with a license for Windows 10 Pro software. You may only use one version of the Windows software at a time. Switching between versions will require you to uninstall one version & install the other version. You must back up all data (files, photos, etc.) before uninstalling & installing operating systems to avoid loss of your data Display 15.6” LCD, LED Backlit Antiglare Resolution: 1920 x 1080 Full HD Graphics Intel HD Graphics Audio Integrated Speakers Input Devices Keyboard & touchpad Networking WLAN Intel 3165 ac 1x 1 +BT 4.2 LE Power Supply Battery 4 Cell 44 WHr AC Adapter 45 Watt Smart n PFC Camera Integrated 720p HD