Apple iMac 21-inch Retina 4K Display

Product Details:

Display:
21.5-inch (diagonal) Retina 4K display
4096-by-2304 resolution with support for one billion colors
500 nits brightness
Wide color (P3)

Processor:
3.0GHz quad?core Intel Core i5 (Turbo Boost up to 3.5GHz)
Configurable to 3.6GHz quad-core Intel Core i7 (Turbo Boost up to 4.2GHz)
or
3.4GHz quad-core Intel Core i5 (Turbo Boost up to 3.8GHz)
Configurable to 3.6GHz quad-core Intel Core i7 (Turbo Boost up to 4.2GHz)

Storage:
1TB (5400-rpm) hard drive
Configurable to 1TB Fusion Drive or 256GB or 512GB SSD
or
1TB Fusion Drive
Configurable to 256GB, 512GB, or 1TB SSD

Memory:
8GB of 2400MHz DDR4 memory
Configurable to 16GB
or
8GB of 2400MHz DDR4 memory
Configurable to 16GB or 32GB

Graphics:
Radeon Pro 555 with 2GB of VRAM
or
Radeon Pro 560 with 4GB of VRAM

Charging 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

Wireless:
Wi-Fi
802.11ac Wi-Fi wireless networking; IEEE 802.11a/b/g/n compatible
Bluetooth
Bluetooth 4.2 wireless technology

Camera:
720p FaceTime HD camera

Size and Weight:
Height: 45.0 cm (17.7 inches)
Width: 52.8 cm (20.8 inches)
Stand depth: 17.5 cm (6.9 inches)
Weight: 5.66 kg (12.5 pounds)

Operating System:
macOS High Sierra