Display 21.5-inch widescreen glossy LED-backlit display (LED technology)
Screen resolution 1920 x 1080 pixels
Intel Core i5 Dual Core 2.3GHz (Turbo Boost up to 3.6GHz)
RAM 8 GB (2 modules of 4 GB) 2133 MHz DDR4 SDRAM;  support up to 16 GB
Graphics Intel Iris Plus Graphics 640 GPU
FaceTime HD video camera;  Mini DisplayPort output supporting DVI, Dual-Link DVI and VGA connections (adapters required; sold separately)
Optional Apple Thunderbolt Display connectivity
1 TB hard drive (Serial ATA 5400 rpm)
No optical drive
Wi-Fi Connection to Wi-Fi 802.11ac network;  IEEE 802.11a / b / g / n compatible
Bluetooth Bluetooth 4.0 + EDR (Enhanced Data Rate)
Networking 10/100/1000 BASE-T Gigabit Ethernet module (RJ-45 connector)
Audio built-in subwoofer (17W)
headphone jack combined with audio input (digital signal support)
line-in
built-in microphone
Connectivity and Expansion 2 Thunderbolt ports (10Gbps)
Gigabit Ethernet port
4 USB 3.0 ports (up to 5Gbps)
SDXC card slot
What's in the box for iMac with preinstalled OS and apps / Apple wireless keyboard / Apple Magic Mouse 2 / Power cord / Warranty card
Pre-installed Mac OS Sierra software
Warranty 3 months warranty
Dimensions 528 x 450 x 175 mm