iPod Touch
iPod touch features a 3.5-inch (diagonal) widescreen multi-touch display and 8 GB or 16 GB flash drive.
The iPod classic is a hard drive-based iPod (80 GB or 160 GB) featuring a large, widescreen color display, a Click Wheel, and the capability of displaying photos and videos.

You can distinguish the iPod classic from the iPod (5th generation) by the front face plate. The 5th gen has a white or black, plastic front face and the 6th gen has a brushed aluminum front face.
Nano (3rd generation)
The iPod nano (3rd generation) is available in 4 GB or 8 GB capacity, and comes in 5 colors.
iPod nano (3rd generation) is distinguished from previous iPod nano models by:
- Its wider screen
- Hold switch location on the bottom
- Its ability to play video
Video iPod (also known as the 5th Generation iPod)
The Video iPod (5th generation) is a a hard drive-based iPod featuring a large, widescreen color display, a Click Wheel, and the capability of displaying photos and videos.
Nano (2nd Generation)
iPod nano (2nd Generation) is distinguished from other models by:
- Its smaller size.
- Its colors.
- The dock connector and headphones port are both located on the bottom of the unit.
- It's aluminum housing rather than the plastic faceplate of the earlier Nano First Generation.
Nano (1st Generation)
iPod nano is smaller than iPod mini and has a color screen and a Click Wheel but has flash memory instead of a hard drive. iPod nano comes in white and black. The capacity of the iPod nano is engraved on the back of the case (1 GB, 2 GB, or 4 GB).
iPod mini
iPod mini is distinguished from other models by:
- Its smaller size.
- Its colors.
- The Hold switch, which is on the top-left side.
- The Click Wheel's button labels, which are on the wheel itself.
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The iPod mini (2nd Generation) models are distinguished from the original iPod mini models by:

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iPod photo
iPod and iPod photo are now one and the same, with every white iPod boasting a full-color display. They continue to have the same controls as iPod (Click Wheel) but now all models have a color display like iPod photo - ideal for viewing album artwork and playing slideshows. These are considered fourth generation models along with iPod (Click Wheel).
iPod (Click Wheel or 4th Generation)
iPod (Click Wheel) models have a Click Wheel like the iPod mini, but are larger and the hold switch is on the top-right side. iPod (Click Wheel) models have a monochrome display. iPod (Click Wheel) is referred to as the 4th generation iPod.

iPod Special Edition U2
The iPod Special Edition U2 is a standard iPod model with certain external differences including: Black plastic exterior, red Click Wheel, signatures of the U2 band members engraved on the back, and "iPod Special Edition U2" engraved on the back. The first model was based an iPod (Click Wheel or 4th Generation) with a 20 GB hard drive. In June 2005 a new version of the iPod Special Edition U2 was introduced that was based on an iPod Photo. These are both also considered fourth generation iPod models. In June 2006, a new version of the iPod Special Edition U2 was introduced that is based on a video iPod (Fifth Generation) with a 30 GB hard drive. In Sept 2006 a model based on the video iPod (Fifth Generation) (30 GB Late 2006) was introduced. You can distinguish Fifth Generation U2 Special Edition iPod (Late 2006) from the Fifth Generation U2 Special Edition iPod by the last three digits of the serial number. The Fifth Generation U2 Special Edition iPod (30 GB Late 2006) serial number's last three digits are W9G.

iPod Special Edition Harry Potter The iPod Special Edition Harry Potter is a standard iPod model with the Hogwarts Crest engraved on the back:

The first model was based an iPod photo with a 20 GB hard drive. In October 2005 a new version of the iPod Special Edition Harry Potter was introduced that was based on an video iPod (Fifth Generation) with a 30 GB hard drive.
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