iMac 21.5-inch 2017

Display
- 21.5-inch (diagonal) LED-backlit display
- 1920‑by‑1080 resolution with support for millions of colors

Processor - 2.3GHz
- 2.3GHz dual‑core Intel Core i5, Turbo Boost up to 3.6GHz

Memory - 2.3GHz
- 8GB of 2133MHz DDR4 memory
- Configurable to 16GB

Storage1
- 1TB (5400-rpm) hard drive
- Configurable to 1TB Fusion Drive or 256GB SSD

Graphics
- Intel Iris Plus Graphics 640
- Video Support and Camera

- FaceTime HD camera
- Simultaneously supports full native resolution on the built-in display at millions of colors and:

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)

Audio

Stereo speakers

Microphone

3.5 mm headphone jack

Support for Apple iPhone headset with microphone

Connections and Expansion

3.5 mm headphone jack

SDXC card slot

Four USB-A ports

Two Thunderbolt 3 (USB-C) ports with support for:

DisplayPort

Thunderbolt (up to 40Gb/s)

USB 3.1 Gen 2 (up to 10Gb/s)

Thunderbolt 2, HDMI, DVI, and VGA supported using adapters (sold separately)

10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)

Wireless

Wi-Fi

802.11ac Wi-Fi wireless networking

IEEE 802.11a/b/g/n compatible

Bluetooth

Bluetooth 4.2 wireless technology

Size and Weight

Height: 17.7 inches (45.0 cm)

Width: 20.8 inches (52.8 cm)

Stand depth: 6.9 inches (17.5 cm)

Weight: 12.0 pounds (5.44 kg)2

Electrical and Operating Requirements

Line voltage: 100–240V AC

Frequency: 50Hz to 60Hz, single phase

Brand : Apple
Cash and carry