Contains the entire English Wikipedia covering 3 million topics. No internet required. Content can be updated quarterly via download or MicroSD card (4GB card included). Runs on 2 AAA batteries (not included), which will last about 1 year.
But Wikipedia is constantly changing, how does it manage the updates?
“Never be out of date either, as the content can be updated quarterly via online download or MicroSD card (4GB card included).”