Question: what is the difference between ipod shuffle 2nd generation and 4th generation?
Answer: It also is worth noting that the iPod shuffle 2nd Gen models have a "dock" to connect the device to a computer whereas the 3rd and 4th Gen models use an extremely short headphone jack-to-USB cable for connectivity. ... However, it is easy to mistake an iPod shuffle 2nd Gen and 4th Gen model if they are not side-by-side.