IPod nano (2nd generation)

On September 25, 2006, Apple updated the iPod nano line. The 2nd-generation iPod nano featured scratch-resistant, anodized aluminum casing like the earlier iPod mini's design; the multiple color choices mirrored those of the minis as well.

Features
Unlike the previous 2nd-generation iPod minis, the button labels were grey instead of matching the casing (with the exception of the black iPod nano, which had a black click wheel). The second-generation iPod nano featured a 40% brighter, "more vibrant" display, a battery life upgrade (from 14 to 24 hours), and storage sizes doubled to 2, 4, and 8 GB models. The second generation also introduced gapless playback of audio files, along with a new search option.

The 2 GB model was available in silver only. The 4 GB was initially available in green, blue, silver, or pink, and the 8 GB model was initially only available in black - red was later added for 4 and 8 GB models. Apple claimed that the second generation iPod Nano's packaging was "32% lighter with 52% less volume than the first generation", thereby reducing environmental impact and shipping costs.

Product history
On October 13, 2006, Apple announced a special edition iPod nano, with a red exterior and 4 GB of storage. For each red iPod nano sold in the United States, Apple donates US$10 to the Product Red initiative, while retaining the regular price. On November 3, 2006, Apple introduced a red 8 GB model, due to "outstanding customer demand", again retaining the same price point of the equivalent black model.