This is somewhat of an odd reappearance of the fourth-generation iPad. When the company introduced the iPad Air, it fully retired that version, but it left the iPad 2, originally launched in March 2011, as the entry-level model.
Now, the iPad 2 is completely removed from the Apple Store. It’s replaced by a fourth-generation 16GB Retina iPad, which costs $399.
In addition to the Retina screen and the faster processor, one of the important differences between the two models is the lightning connector, which the iPad 2 didn’t have. The only devices in Apple Store that still sport the old 30-pin connector are the iPhone 4S and the iPod classic.