LibKey Discovery integrates LibKey into iSearch to provide one-click access to the full text of library-licensed and open access articles.
When you find an article in iSearch for which full text is available through EdUHK University subscriptions, it allows you to connect directly to the PDF of an article with one click.
LibKey is a product comes from our BrowZine vendor, there is also an option to view the table of contents of the journal issue in which the article appears.

LibKey Link Technical FAQ
https://support.thirdiron.com/knowledgebase/articles/1947991-libkey-link-technical-faq