This is a card with the license key that allows you to activate services, such as content filtering, anti-virus, anti-spam and so on.
Curb those unruly web surfing with ZyXEL's top-notched content filtering feature. Partnered with world-class content filtering service provider, administrators can block access to non-work related or questionable websites, increasing business productivity. Configuring is easy as checking off which categories of content you want to allow or block.