iMac Intel 21.5" EMC 2428 (Mid 2011)
iMac Intel 21.5" (EMC No. 2428) Airport/Bluetooth Board
This wireless card provides wireless Airport and Bluetooth networking capability for Model A1311 Late Mid 2011 21.5" iMacs.
In May 2011, Apple upgraded the 21.5" iMac. Externally, the machine features edge-to-edge glass and an aluminum rear bezel. Internally, an LED display, 4 RAM slots (to upgrade to a maximum of 16 GB RAM), more powerful video processing, and featuring quad Core i5 and i7 processors.