The Apple MacBook Air "Core i5" 1.7 11" (Mid-2012/USB 3.0) features a 22-nm "Ivy Bridge" 1.7 GHz Intel "Core i5" processor (3317U) with two independent processor "cores" on a single chip, a 3 MB shared level 3 cache, 4 GB of onboard 1600 MHz DDR3L SDRAM (which cannot be upgraded after purchase), 128 GB of flash storage, and an "integrated" Intel HD Graphics 4000 graphics processor that shares system memory. This all is packed in a razor-thin (0.11-0.68 inch), 2.3 pound, aluminum case with an integrated 720p "FaceTime HD" webcam, a backlit full-size keyboard and an 11.6" widescreen TFT LED backlit active-matrix "glossy" display (1366x768 native resolution). Connectivity includes 802.11a/b/g/n Wi-Fi, Bluetooth 4.0, analog audio out, a "Thunderbolt" port, and two USB 3.0 ports. It lacks internal Ethernet, although an external Thunderbolt adapter was offered as a US$29 option.