ACER Aspire Celeron E5-511-C33M comes with Windows 8.1, 64-bit Operating System, Intel Celeron N2940 1.83 GHz Quad-core (4 Core) Processor, Led Backlit 1366 x 768 Pixels 15.6" LCD Display, 500 GB Hard Drive, 4 GB DD3L SD RAM, Intel HD Graphics, DDR3L HD RAM, Shared, ACER Aspire Celeron E5-511-C33M also has Integrated stereo speakers, Webcam, Microphone, 6-cell lithium-ion, Power adapte, USB 3.0 x 1 No of USB 2.0 x 2, HDMI x 1, VGA x 1 by Acer.