20-inch iMac
Height: 18.5 inches (46.9 cm)
Width: 19.1 inches (48.5 cm)
Depth: 7.4 inches (18.9 cm)
Weight: 20 pounds (9.1 kg)1

Communications
Built-in AirPort Extreme Wi-Fi wireless networking (based on IEEE 802.11n draft specification);2 IEEE 802.11a/b/g compatible
Built-in Bluetooth 2.1 + EDR
Built-in 10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)
Audio
Built-in stereo speakers
Internal 24-watt digital amplifier
Headphone/optical digital audio output (minijack)
Audio line in/optical digital audio input (minijack)
Built-in microphone
Support for Apple Stereo Headset with microphone
Software
Mac OS (includes iTunes, Time Machine, Quick Look, Spaces, Spotlight, Dashboard, Mail, iChat, Safari, Address Book, QuickTime, iCal, DVD Player, Photo Booth, Front Row, Xcode Developer Tools)
iLife '09 (includes iPhoto, iMovie, iDVD, iWeb, GarageBand)
Environmental Status Report
Arsenic-free display glass

Display
Built-in 20-inch glossy widescreen TFT active-matrix liquid crystal display
Resolution
20-inch model: 1680 by 1050 pixels
Millions of colors at all resolutions

Apple iMac 8,1 (A1224), Core 2 Duo, 2.6Ghz, 4GB Ram, 60GB SSD HDD

Details:

Model Identifier : iMac 9,1

Year: Mid-2010

Processor name: Core 2 Duo

Processor Speed: 2.6GHZ

Memory: 4GB

Hard drive Capacity : 60GB SSD

Video Card : Radeon HD 2600

Screen Size: 20"

USB Port: USB 4 (2.0)

Battery Type: N/A

Mac iOS : OS X Snow Leopard

Webcam: Yes

The Image is bright and clear with no blemishes or bruising to the screen. There will be no surface scratches on the screen.

Including mouse and Keyboard.