When this small box is plugged into the Control Console, it disconnects the entire coordinate sub-system of a TARDIS, which results in a TARDIS being removed from the normal dimensions of time and space and being relocated outside of Normal Space. The Unit can be used to remove a trapped TARDIS from a dangerous environment but runs the risk of trapping it in the Land of Fiction. For this reason the Emergency Unit has a built in timer to warn the operator to log in the coordinate subsystems and leave as soon at the Time Rotor's Energy Storage Unit is charged- usually 12 minutes.