The basic configuration would be as follows:
* iMac with Intel Core i3 processor (I3-540) @ 3.06Ghz (1x processor; 2x cores) * Built-in 21.5" LED-backlit glossy widescreen TFT LCD display with IPS (up to 1920 x 1080 resolution) * 4Gb RAM DDR3 PC3-10600 (1333Mhz) SDRAM SO-DIMM * 500Gb Serial-ATA hard drive; 7200rpm * Slot-loading 8x Dual-Layer SuperDrive optical drive -- reads/writes/rewrites CDs and DVDs * ATI Radeon HD 5670 with 512MB DDR3 SDRAM * Built-in iSight camera * Built-in stereo speakers, built-in microphone, headphone/optical digital audio output, audio line in * Built-in 10/100/1000BASE-T (Gigabit) Ethernet * Built-in AirPort Extreme wireless 802.11a/b/g/n * Built-in Bluetooth 2.1 + EDR (Enhanced Data Rate) module * 1x Secure Digital slot (SDXC) * 1x Mini DisplayPort * 1x FireWire 800 port (up to 800 Mbps) * 4x USB 2.0 ports (up to 480 Mbps) * Apple model: A1311 (EMC 2389), MC508 (iMac11,2) * Apple description: iMac (21.5-inch, Mid 2010) [codename "Clarkdale"] * Introduced: July 2010 * Discontinued: March 2011