The OptiPlex 3050 is a mid-range business desktop. A small form factor means this workhorse does not take up much space on your desk. Great performance and compact design make this PC an excellent addition to any home or office.
Dell Optiplex 3050 SFF Desktop computer PC, Intel Quad Core i5-6500 up to 3.6GHz, 16GB DDR4, 256GB SSD
Includes: USB Keyboard & Mouse, USB WiFi adapter, Microsoft office 30 days free trail.
Port: Front: USB 3.0(2), USB 2.0(2); Rear: DP, HDMI, USB 3.0(2), USB 2.0(2), RJ-45. 
Support 4K (3840x2160) Dual display, makes it easy to connect two monitors at the same time, and you can expand working Windows, mirror content, or expand a single window across multiple monitors.