iMac 27-inch with Retina 5K display 3.1GHz 6-core i5 256GB

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

3.1GHz 6‑core 10th-gen Core i5

Memory

8GB (two 4GB) of 2666MHz DDR4 memory; four SO-DIMM slots, user accessible

Storage

256GB SSD

Graphics

Radeon Pro 5300 with 4GB of GDDR6 memory

Video Support And Camera

FaceTime HD camera

Simultaneously supports full native resolution on the built-in display at 1 billion colors and:

One 6016-by-3384 (6K) external display at 60Hz with support for 1 billion colors, or
Two 6016-by-3384 (6K) external displays at 60Hz with support for 1 billion colors (requires Radeon Pro 5700 or Radeon Pro 5700 XT), or
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 (sold separately)

Wireless

Wi-Fi
802.11ac Wi-Fi wireless networking
IEEE 802.11a/b/g/n compatible

Bluetooth
Bluetooth 4.2 wireless technology

Connections And Expansion

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)
Thunderbolt 2, HDMI, DVI, and VGA supported using adapters (sold separately)
10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)
Kensington lock slot

Audio

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

In The Box

iMac with Retina 5K display
Magic Keyboard
Magic Mouse 2
Power cord
Lightning to USB Cable