The iMac "Core i5" 3.0 21.5-Inch Aluminum (Retina 4K, Mid-2017/Kaby Lake) features a 14-nm "Kaby Lake" 3.0 GHz Intel "Core i5" processor (7400) with four independent processor "cores" on a single chip, a 6 MB shared level 3 cache, 8 GB of 2400 MHz DDR4 SDRAM that is reportedly onboard -- but actually can be upgraded later -- a 1 TB (5400 RPM) hard drive, and a Radeon Pro 555 graphics processor with 2 GB of dedicated VRAM. It also has a built-in "FaceTime HD" webcam and stereo speakers.

This model has a 21.5" 4096x2304 LED-backlit 16:9 widescreen IPS DCI-P3 "Retina 4K" display (that runs "pixel doubled" to look like 2048x1152). The rear of the case is aluminum and is thicker in the middle and tapers to a razor thin 5 mm at the edges.

Connectivity includes four USB 3.0 ports, dual Thunderbolt 3 (USB-C) ports, Gigabit Ethernet, 802.11ac Wi-Fi, and Bluetooth 4.2.

Compared to its predecessor, this model essentially has the same external enclosure, but it has a more advanced processor and architecture as well as dedicated graphics, a brighter display, and Thunderbolt 3 (USB-C) ports.

Specifications

Make & Model - Apple iMac 21.5" 4K 2017

Form Factor - All in One

Processor - Intel Core i5 7400 3.0Ghz

Ram - 8Gb

Hard Drive - 256Gb

Hard Drive Type - SSD

Connectivity - 3.5 mm headphone jack; SDXC card slot; Four USB 3 ports (compatible with USB 2); Two Thunderbolt 3 (USB-C) ports with support for: DisplayPort, Thunderbolt (up to 40 Gbps), USB 3.1 Gen 2 (up to 10 Gbps); 10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector); Kensington lock slot

Display - 21.5-inch (diagonal) Retina 4K display 4096-by-2304 resolution with support for one billion colors

Optical Drive - Nil

Network - WiFi Wireless, Bluetooth, Ethernet

Operating System - macOS

Condition - Refurbished Grade A

Whats Included - PC + Power Cable/ Adapter

Warranty - 6 Months

All parts are original unless specified otherwise