Tap & scroll your way through the workday with an intuitive touchscreen (select models) that helps you work so much smarter. Count on durability inside & out – from built-in security to the spill-resistant keyboard – & a thin, light design that’s packed with style. Processor Intel Core i 5-3230M 2.6 G Hz 3MB Cache 2 Cores Mobile Intel HM76 Express Memory 8GB DDR3 1600 M Hz SDRAM 2 x so DIMM Hard Drive 750GB 5400rpm SATA Optical Drive Super Multi DVD±R/RW with double layer support Software Operating System: Windows 7 Professional 64 (available through downgrade rights from Windows 8 Pro) (This system is preinstalled with Windows 7 Professional software & also comes with a license & media for Windows 8 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 39, 6 cm (15.6") diagonal LED-backlit HD anti-glare Resolution: 1366 x 768 Graphics Intel HD Graphics 4000 Audio DTS Sound+ Integrated stereo speakers Integrated digital microphone (dual-microphone array when equipped with optional webcam) Stereo headphone/line out Stereo microphone/line in Networking Ralink 802.11b/g/n (1x 1) Bluetooth 4.0 combo Power Supply 65W Smart AC adapter; HP Fast Charge 6-cell (47 WHr) Li-Ion Dimensions Width 37.5 cm Depth 25.6 cm Height 2.28cm Weight 2.29kg Interfaces 2 USB (Universal Serial Bus) 3.0 2 USB (Universal Serial Bus) 2.0 1 HDMI 1 stereo microphone in 1 AC power 1 RJ-45 1 headphone/line-out 1 VGA Expansion 1 Secure Digital Warranty / Misc 1 Year Manufacturer Warranty HD Webcam