The VBox allows for the easy removal of air and insertion of ink without the need to drill a hole in the cartridge. The syringe device extracts air to create a vacuum inside the cartridge and then fills it with ink.
Meanwhile the Airbox pushes air bubbles out of the print head. Air bubbles can appear in the print head after a cartridge has been refilled and will interrupt the ink flow, spoiling a print. The Airbox creates pressure to push out the bubbles and can be used on each chamber individually.