The DisplayPort to VGA adapter allows you to connect your DisplayPort-equipped computer to a VGA monitor or projector. The adapter works with computers equipped with DisplayPort, such as your HP Elitebook Revolve 810 G3.
Take the adapter with you when traveling, to connect with VGA displays at trade shows or hotel rooms
Connect your BYOD laptop (Bring your own computer) to work with the projector in a boardroom or in shared areas of an office equipped with VGA
Use your VGA monitor as a secondary display.