 "Apple 21.5" 2.5GHz Intel Quad-Core i5 iMac Desktop Computer"@en Computer - Z0H6TBD2 Abt"@en
 "Fair Condition*: Apple iMac 21.5-inch 2.5GHz Quad-Core i5 (Mid 2011) MC309LL/A" "iMac 21.5" 2011)* | macofalltrades"
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*This unit has 2 non-functioning USB ports. 

Apple Part Number: MC309LL/A

Hardware Configuration
21.5-inch LED-backlit glossy widescreen TFT LCD display with IPS, 1920x1080 resolution2.5GHz quad-core Intel Core i5 processor4.0GB (2x2.0GB) PC3-10600 (1333MHz) DDR3 SO-DIMM, supports up to 32.0GB500GB Serial ATA hard disk drive @ 7200RPMDVD-RW/CD-RW SuperDrive-DLAMD Radeon HD 6750M graphics with 512MB GDDR5 memoryAirPort Extreme wireless card (802.11a/b/g/n)Bluetooth 2.1 + EDRBuilt-in FaceTime HD camera1- Thunderbolt port4- USB 2.0 ports1- FireWire 800 port1- Ethernet port1- Secure Digital (SDXC) slot" 