iPod is a brand of portable media players designed and marketed by Apple Inc. and launched on October 23, 2001 (2001-10-23). The product line-up includes the hard drive-based iPod Classic, the touchscreen iPod Touch, the video-capable iPod Nano, and the compact iPod Shuffle. The iPhone can function as an iPod but is generally treated as a separate product. Former iPod models include the iPod Mini and the spin-off iPod Photo (since reintegrated into the main iPod Classic line). iPod Classic models store media on an internal hard drive, while all other models use flash memory to enable their smaller size (the discontinued Mini used a Microdrive miniature hard drive). As with many other digital music players, iPods, excluding the iPod Touch, can also serve as external data storage devices. Storage capacity varies by model. Model | Generation | Image | Capacity | Connection | Original release date | Minimum OS to sync | Rated battery life (hours) | Classic | first | | 5, 10 GB | FireWire | 23 October 2001 | Mac: 9, 10.1 | audio: 10 | First model, with mechanical scroll wheel. 10 GB model released later. | second | | 10, 20 GB | FireWire | 17 July 2002 | Mac: 10.1 Win: 2000 | audio: 10 | Touch-sensitive wheel. FireWire port had a cover. Hold switch revised. Windows compatibility through Musicmatch. | third | | 10, 15, 20, 30, 40 GB | FireWire (USB for syncing only) | 28 April 2003 | Mac: 10.1 Win: 2000 | audio: 8 | First complete redesign with all-touch interface, dock connector, and slimmer case. Musicmatch support dropped with later release of iTunes 4.1 for Windows. | fourth (Photo) (Color) |  | 20, 40 GB | FireWire or USB | 19 July 2004 | Mac: 10.2 Win: 2000 | audio: 12 | Adopted Click Wheel from iPod Mini, hold switch redesigned. | | photo: 30, 40, 60 GB | FireWire or USB | 26 October 2004 | Mac: 10.2 Win: 2000 | audio: 15 slideshow: 5 | color: 20, 60 GB | 28 June 2005 | Premium spin-off of 4G iPod with color screen and picture viewing. Later re-integrated into main iPod line. | fifth | | 30, 60, 80 GB | USB (FireWire for charging only) | 12 October 2005 | Mac: 10.3 Win: 2000 | 30 GB audio: 14 video: 2 (later 3.5) | 60/80 GB audio: 20 video: 3/6.5 | Second full redesign with a slimmer case, and larger screen with video playback. Offered in black or white. Hardware and firmware updated with 60 GB model replaced with 80 GB model on 12 September 2006. | sixth |  | 80, 120, 160 GB | USB (FireWire for charging only) | 5 September 2007 | Mac: 10.4 Win: XP | 80 GB audio: 30 video: 5 | 120 GB audio: 36 video: 6 | 160 GB audio: 40 video: 7 | Introduced the "Classic" suffix. New interface and anodized aluminum front plate. Silver replaces white. In September 2008 the hardware and firmware was updated with a 120 GB model replacing the 80 GB model. The 160 GB model was discontinued. | Mini | first |  | 4 GB | USB or FireWire | 6 January 2004 | Mac: 10.1 Win: 2000 | audio: 8 | New smaller model, available in 5 colors. Introduced the "Click Wheel". | second |  | 4, 6 GB | USB or FireWire | 22 February 2005 | Mac: 10.2 Win: 2000 | audio: 18 | Brighter color variants with longer battery life. Click Wheel lettering matched body color. Gold color discontinued. Later replaced by iPod Nano. | Nano | first | | 1, 2, 4 GB | USB (FireWire for charging only) | 7 September 2005 | Mac: 10.3 Win: 2000 | audio: 14 slideshow: 4 | Replaced Mini. Available in black or white and used flash memory. Color screen for picture viewing. 1 GB version released later. | second |  | 2, 4, 8 GB | USB (FireWire for charging only) | 12 September 2006 | Mac: 10.3 Win: 2000 | audio: 24 slideshow: 5 | Anodized aluminum casing and 6 colors available. | third |  | 4, 8 GB | USB (FireWire for charging only) | 5 September 2007 | Mac: 10.4 Win: XP | audio: 24 video: 5 | 2" QVGA screen, colors refreshed with chrome back, new interface, video capability, smaller Click Wheel. | fourth |  | 4, 8, 16 GB | USB | 9 September 2008 | Mac: 10.4 Win: XP | audio: 24 video: 4 | Revert to tall form and all-aluminum enclosure with 9 color choices, added accelerometer for shake and horizontal viewing. 4 GB model limited release in select markets. | shuffle | first | | 512 MB, 1 GB | USB (no adaptor required) | 11 January 2005 | Mac: 10.2 Win: 2000 | audio: 12 | New entry-level model. Uses flash memory and has no screen. | second |  | 1, 2 GB | USB | 12 September 2006 | Mac: 10.3 Win: 2000 | audio: 12 | Smaller clip design with anodized aluminum casing. 4 color options added later. Colors were later refreshed twice. | third | | 4 GB | USB | 11 March 2009 | Mac: 10.4 Win: XP | audio: 10 | Smaller design with controls relocated to right earbud cable. Two colors, and features VoiceOver. | Touch | first | | 8, 16, 32 GB | USB (FireWire for charging only)[citation needed] | 5 September 2007 | Mac: 10.4 Win: XP | audio: 22 video: 5 | First iPod with Wi-Fi and a Multi-Touch interface. Features Safari browser and wireless access to the iTunes Store and YouTube. 32 GB model later added. iPhone OS 2.0 and App Store access requires an upgrade fee. | second | | 8, 16, 32 GB | USB | 9 September 2008 | Mac: 10.4 Win: XP | audio: 36 video: 6 | New tapered chrome back with Nike+ functionality, volume buttons, and built-in speaker added. iPhone OS 2.0 and App Store access standard. | |
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