21.5-inch iMac with Retina 4K display • 21.5-inch (diagonal) 16:9 widescreen LED-backlit Retina 4K display; 4096 by 2304 pixels; ambient light sensor • 3.0GHz quad-core Intel Core i5 with 6MB shared L3 cache (Turbo Boost up to 3.5GHz) • 8GB of 2400MHz DDR4 memory • 1TB 5400-rpm hard drive • Radeon Pro 555 with 2GB of VRAM • FaceTime HD camera* • Two Thunderbolt 3 (USB-C) ports; support for high-speed 1/0 and video out • SDXC card slot and four USB-A ports • 10/100/1000BASE-T Ethernet • Built-in stereo speakers, microphone, headphone jack
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