Lenovo ThinkPad Edge E550 15.6" (1366x768) Laptop | Core i3-5005U 2.0GHz | 500GB | 4GB | DVD +/- RW | Intel 3160 AC | Windows 7 Professional 64 bit 15.6" (1366x768) Display (LED backlight, anti-glare, 200 nits, 16:9 aspect ratio) with Intel HD Graphics 5500 Intel Dual Core i3-5005U 2.0 GHz Processor ; 4GB DDR3 RAM installed, expandable to 16GB 500GB 7200RPM Hard Drive; DVD+/-RW Read and Write DVD Intel 3160 ac + Bleutooth 4.0; Webcam; 6-Cell 48 Wh Li-Ion Battery Windows 7 Pro 64-Bit downgrade rights in Windows 10 64-Bit; Lenovo's Top Seller, Perfect for small business or school use.