Display

• 21.5-inch (diagonal) LED-backlit display with IPS technology

• 1920‑by‑1080 resolution with support for millions of colors

Processor

• 2.8GHz

  • 2.8GHz quad‑core Intel Core i5 (Turbo Boost up to 3.3GHz)

Storage

• 2.8GHz

  • 1TB (5400-rpm) hard drive

Graphics

• 2.8GHz

  • Intel Iris Pro Graphics 6200

Video Support and Camera

• 1.6GHz

  • FaceTime HD camera

  • Simultaneously supports full native resolution on the built-in display and up to 3840 by 2160 pixels on an external display

  • Support for extended desktop and video mirroring modes

• 2.8GHz

  • FaceTime HD camera

  • Simultaneously supports full native resolution on the built-in display and up to 4096 by 2304 pixels on an external display

  • Support for extended desktop and video mirroring modes

Audio

• Stereo speakers

• Dual microphones

• 3.5 mm headphone jack

  • Headphone/optical digital audio output (minijack)

  • Support for Apple iPhone headset with microphone

Connections and Expansion

• 3.5 mm headphone jack

• SDXC card slot

• Four USB 3 ports (compatible with USB 2)

• Two Thunderbolt 2 ports

  • Mini DisplayPort output

  • Support for HDMI, DVI, VGA, and dual-link DVI (adapters sold separately)

• 10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)
• Kensington lock slot

• Wireless 
• 802.11ac Wi-Fi wireless networking
• IEEE 802.11a/b/g/n compatible
• Wi-Fi
• Bluetooth
• Bluetooth 4.0 wireless technology