Apple iMac 21.5" 2015 Desktop Computer Quad Core i5 2.7GHz 8GB 500HDD

Display 21.5-inch (diagonal) LED-backlit display with IPS technology; 1920-by-1080 resolution with support for millions of colors Processor 2.7GHz 2.7GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.2GHz) with 4MB L3 cache Memory 8GB (two 4GB) of 1600MHz DDR3 memory Configurable to 16GB. Storage 500 HDD (5400-rpm) hard drive Graphics 2.7GHz Intel Iris Pro graphics Video Support and Camera 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) Audio Stereo speakers Dual microphones Headphone port Headphone/optical digital audio output (minijack) Support for Apple iPhone headset with microphone Connections and Expansion SDXC 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 slot   Wireless Wi-Fi 802.11ac Wi-Fi wireless networking;2 IEEE 802.11a/b/g/n compatible Bluetooth Bluetooth 4.0 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: 12.5 pounds (5.68 kg)3 Electrical and Operating Requirements Line voltage: 100-240V AC Frequency: 50Hz to 60Hz, single phase Operating temperature: 50° to 95° F (10° to 35° C) Relative humidity: 5% to 95% noncondensing Operating altitude: tested up to 10,000 feet