ACER Aspire Core i5 E5-571-5940 comes with Windows 7 Home Premium, 64-bit Operating System, Intel Core i5-4210U, 1.70 Ghz Processor, Led Backlit HD Screen 1366 x 768 Pixels 15.6" LCD Display, 500 GB Hard Drive, 6 GB DD3L SD RAM, Intel Shared Memory, ACER Aspire Core i5 E5-571-5940 also has Integrated speakers, Webcam, Microphone, 6-cell lithium-ion, 2500 mAh 40W Battery, Power adapte, USB 3.0 x 2 No of USB 2.0 x 1, HDMI x 1, VGA x 1 by Acer.