Tripp-Lite B005-DPUA4 El Manual Del Propietario página 9

Special Function Operation
³ Turning on this function will cause DisplayPort, microphone and speaker
ports to enter automatic switching mode without USB. Press any key (except
Spacebar) to exit to the port used prior to the automatic switching sequence.
Press Spacebar to stay at the port currently in use. When automatic switching
mode is enabled, the corresponding "Select" LED of the port currently in use
will flash.
"N" indicates the number of switching interval, which can be 5 seconds to
4
999 seconds.
"1" means On, "0" means Off.
5
This mode only relates to hotkey function #4 and #6.
6
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