An audio DJ uses headphones so the DJ can hear the unmixed output of each turntable independently in order to queue up the next track. A DVJ needs similar capabilities with video, which requires multiple displays. With component-based systems, a small flat-panel monitor or TV needs to be set up for each player and given the raw video feed of the player through a Y-splitter cable. With a computer setup, the computer or laptop must have two video outputs; the primary screen has both sources and the mixed output shown, and the mixed output sent out the secondary output to the house, and commonly a monitor for the DVJ. This setup saves space needed in the DJ booth from 3 monitors plus a controller down to the pc/laptop(s) and an output monitor. As better technologies, formats and resolutions are available, these systems can also be upgraded to support them, a major point over component systems.