Once installed and correctly configured, slave clocks are virtually maintenance free in contrast to high-maintenance stand-alone clocks. In many countries, clocks need to be adjusted twice a year to correct for daylight saving time. If a large number of clocks need correcting, it can be very time-consuming. Often clocks are located at height or in inaccessible positions that makes the task even more time-consuming. Additionally, adjustment often takes place well after the event, clocks will therefore be incorrect for an extended period.
Master clocks adjust for daylight saving time automatically, requiring no manual user intervention. Additionally, all clocks adjust at the correct moment so that a continuously accurate time is displayed. An added advantage is that slave clocks can often be configured to display time in different time-zones, ideal for trading floors and meeting rooms.