Add an additional monitor without adding an expensive, internal video card and avoid complicated installation. Hot-swappable USB enables you to add or remove monitors without rebooting your system Move and view your large spreadsheets across two screens without overlapping windows Great for multitasking in a wide variety of fields including: Phone centers, Stock Markets, Hospitals, Graphic Design, Editing, Accounting, Etc. A must-have for surfing the web and working on your email/Facebook/Twitter accounts all at the same time.