QNAP put together an informative package for the TS-421. This is a full retail design for stores like Fry's and Microcenter.
Bits of information, usage and specs are on every side of the package.
Even with all of the information given, QNAP still couldn't fit it all on the package.
The power supply is an external units, sometimes called a power brick. This reduces the temperature inside the NAS.
Here we see the other included accessories. The specifications on QNAP's website stated a single Ethernet cable, but our package shipped with two. The power cable and two packs of mounting screws included are shown above.