i believe the word you are looking for is frequency. I would say that an easier way.. used to be to just squish the gags together, unless there is a hidden on, this is the way that I showed tower how to do while i worked there. they never listened.
but, all the same, don't try this at home... oh, and if you need to get into the bathrooms there, the code is 96939.
kthanks. that works at all tower stores by the way.