21.5" iMac with Retina 4K Display; 3.4GHz quad-core Intel Core i5

Display: 21.5-inch (diagonal) 16:9 widescreen LED-backlit Retina 4K display; 4096 by 2304 pixels; ambient light sensor
Processor: 3.4GHz Intel Core i5
Memory: 8GB DDR4
Storage: 1TB Fusion Drive
Graphics: radeon Pro 560 with 4GB of VRAM