Processor: 2.9GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.6GHz) with 6MB L3 cache 

Memory: 8GB (two 4GB) of 1600MHz DDR3 memory

Hard drive: 1TB (5400-rpm) hard drive

Graphics: NVIDIA GeForce GT 650M graphics processor with 512MB of GDDR5 memory

Video:

• FaceTime HD camera
• Simultaneously supports full native resolution on the built-in display and up to a 30-inch display (2560 by 1600 pixels) on an external display
• Support for extended desktop and video mirroring modes
• Support for Target Display Mode via the Thunderbolt port using a Thunderbolt to Thunderbolt cable (sold separately)

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

Connections and Expansion:

• SDXC card slot
• Four USB 3 ports
• Two Thunderbolt ports
• Mini DisplayPort output with support for DVI, VGA, and dual-link DVI (adapters sold separately)
• 10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)
• Kensington lock slot

Audio:

• Stereo speakers
• Dual microphones
• Headphone port

• • Headphone/optical digital audio output (minijack)
  • Support for Apple iPhone headset with microphone

Wireless:

• Wi-Fi
• 802.11n Wi-Fi wireless networking;2 IEEE 802.11a/b/g compatible
• Bluetooth
• Bluetooth 4.0 wireless technology