Ergotron 33-342-200 WorkFit-S Sitting Standing Desk Mount Computer Workstation for LCD monitor
www.ergotron.com/Products/tabid/65/PRDID/379/language/en-US/Default.aspx
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
Stay energized, healthy and productive while you compute—change from a sitting to a standing position whenever you want. This height-adjustable workstation moves your keyboard and display in one simple motion, making computing comfortable for prolonged periods.