

The iPod photo was designed and marketed by Apple as the top-of-the-line model in the iPod family. The 4th generation was shipped in capacities of 20 GB and 40 GB. The screen once again was blue-hued monotone as was the third generation, but the interface displayed several new features. The backlighting on the controls was dropped, but the new model did give users four more hours of battery life. The fourth-generation iPod continued evolving by integrating the functions of separate buttons into the wheel itself. This was the first iPod to feature a dock connector which was proprietary to the iPod. It was a unique design as the 4 buttons (menu, play/pause, forward, backward) were separate illuminated buttons above the wheel. It was redesigned as it had a new control wheel which was very different to the previous iPod as it was flat on the surface of the iPod instead of rising up from the case. The third-generation iPod is considered to be the iPod which helped the product take off in the main market. In December 2002, Apple unveiled its first limited edition iPods, with either Madonna’s, Tony Hawk’s, or Beck’s signature or No Doubt's band logo engraved on the back for an extra US$50. These versions came with a 4-pin to 6-pin FireWire adapter and were bundled with Musicmatch Jukebox instead of iTunes. Notably, Apple began selling Windows-compatible versions of the iPod starting with the second generation. The first-generation 5 GB iPod was carried over, but its price was reduced to US$299. The second-generation class was available in 10 GB for US$399 and 20 GB for US$499.

The front plate also had rounded corners and edges. Using the same body style as the first generation, the hold switch was redesigned, a cover was added to the FireWire port, and the mechanical wheel was replaced with a touch-sensitive wheel. The second-generation iPod was introduced on July 17, 2002. vCard compatibility was added, as well, allowing iPods to display business card information synced from a Mac. On March 20, 2002, Apple introduced a 10 GB model of the first generation iPod for US$499. The iPod had a rated battery life of ten hours and data transfers were conducted through the FireWire port. Among the iPod's innovations were its small size, achieved using a 1.8" hard drive, whereas its competitors were using 2.5" hard drives at the time, and its easy-to-use navigation, which was controlled using a mechanical scroll wheel (unlike later iPods, which had touch-sensitive scroll wheels), a center select button, and four auxiliary buttons around the wheel. The first iPod had a black and white LCD (liquid-crystal display) screen and featured a 5 GB hard drive capable of storing 1,000 songs encoded using MP3 and was priced at US$399. Apple introduced the first-generation iPod on October 23, 2001, with the slogan "1,000 songs in your pocket".
