Apple iMac 21.5" Intel Quad Core i5-2400S 2.5GHz 4GB 500GB All-in-One Computer 21.5-inch LED-backlit glossy widescreen display with IPS technology, 1920 x 1080-pixel resolution, 16:9 aspect ratio, and 178-degree viewing angle 2.5 GHz Intel Core i5 quad-core processor ("Sandy Bridge") with 6 MB shared L3 cache for excellent multitasking 500 GB Serial ATA hard drive (7200 RPM) and 4 GB installed RAM Built-in FaceTime camera for video chatting and Bluetooth 2.1 + EDR for connecting with peripherals Built-in stereo speakers with two internal 17-watt high-efficiency amplifiers