<P> The fifth and sixth generations of the iPod touch both feature a new dock connector, called "Lightning", which replaces the 30 - pin dock connector on older iPhone, iPad and iPod models . The Apple Lightning connector has eight pins and all the signaling is digital . This new connector is smaller than the previous one allowing for a slimmer form factor . Apple Lightning cables have duplicate pins on both sides of the plug, this makes the plug reversible . Various accessories are available to connect the Apple Lightning connector to the older 30 - pin dock connector or USB, although not all old accessories will work, because the lightning connector cannot handle analog signals . </P> <P> As of October 2018, there are six types of produced iPod Touch devices . </P> <Ul> <Li> 1st generation (2007--2008) Supported until 2010 (iPhone OS 3.1. 3) </Li> <Li> 2nd generation (2008--2010) Supported until 2011 (iOS 4.2. 1) </Li> <Li> 3rd generation (2009--2010) Supported until 2012 (iOS 5.1. 1) </Li> <Li> 4th generation (2010--2013) Supported until 2014 (iOS 6.1. 6) </Li> <Li> 5th generation (2012--2015) Supported until 2016 (iOS 9.3. 5) </Li> <Li> 6th generation (2015--present) Supported as of 2018 (iOS 12.0) </Li> </Ul> <Li> 1st generation (2007--2008) Supported until 2010 (iPhone OS 3.1. 3) </Li>

How many generations of ipods touch are there
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