Apple iMac A2115 27" Retina 5K (2019) - i5-8500, 16GB RAM, 512GB SSD, Radeon Pro 570X 4GB Graphics, macOS, Macally Keyboard & Mouse.

Display
Retina 5K display
27-inch (diagonal) Retina 5K display
5120-by-2880 resolution with support for one billion colors
500 nits brightness
Wide color (P3)

Processor
3.0GHz 6-core Intel Core i5 (Turbo Boost up to 4.1GHz)

Memory
16GB of 2666MHz DDR4 memory; four SO-DIMM slots, user accessible

Storage
512GB SSD

Graphics
Radeon Pro 570X with 4GB of GDDR5 memory

Video Support and Camera
FaceTime HD camera
Simultaneously supports full native resolution on the built-in display at 1 billion colors and:
One 5120-by-2880 (5K) external display at 60Hz with support for 1 billion colors, or
Two 3840-by-2160 (4K UHD) external displays at 60Hz with support for 1 billion colors, or
Two 4096-by-2304 (4K) external displays at 60Hz with support for millions of colors
Thunderbolt 3 digital video output
Native DisplayPort output over USB-C
Thunderbolt 2, HDMI, DVI, and VGA output supported using adapters (adapters not included)

Audio
Stereo speakers
Microphone
3.5 mm headphone jack
Support for Apple iPhone headset with microphone