Apple iMac AIO ME088ZP/A PC Desktop (27", i5, 3.2QC, 2x4GB, 1TB, GT755M)

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)AudioStereo speakers
Dual microphones
Headphone port
Headphone/optical digital audio output (minijack)
Support for Apple iPhone headset with microphoneConnections and ExpansionSDXC card slot
Four USB 3 ports (compatible with USB 2)
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 slotInputApple Wireless Keyboard

Full-size keyboard with 78 (US) or 79 (ISO) keys, including 12 function keys and four arrow keys (inverted ‘T’ arrangement)
Magic Mouse

Smooth, seamless Multi-Touch surface with support for simple gestures (scrolling and swiping). Click and double-click anywhere. Ambidextrous construction accommodates left- and right-handed users.
Magic Trackpad

Glass Multi-Touch trackpad for precise cursor control; supports inertial scrolling, pinch and expand, swipe, three-finger swipe, four-finger swipe, tap, double-tap, rotate, screen zoom, scroll, click and drag, click drag and lock, and secondary click A and B.WirelessWi-Fi
802.11ac Wi-Fi wireless networking2; IEEE 802.11a/b/g/n compatible

Bluetooth
Bluetooth 4.0 wireless technologSoftwareOS X Mountain Lion
Includes Mail, Messages, Contacts, Calendar, Safari, Reminders, Notification Center, Notes, Dictation, iCloud, Time Machine, FaceTime, Photo Booth, AirPlay, Game Center, the Mac App Store, iTunes, Gatekeeper, Twitter and Facebook integration and more.