Toggle relay: A relay status will toggle between activated / de-activated when pressed.
Both relays integrated in intelligent devices such as matrix systems or relays
from separate relay units can be controlled from APM.
Pulse relay: A relay will activate when pressed, as long as the button is held. (Press and
hold) When released the relay will return back to idle status.
Layer select (1-3): Switches between different layers of programmation, allowing control of an
increased number of zones / functions. (Only available when using APM116)
Group buttons: using multiple functions at once, an example of this might be to select a zone
and play a messages to that zone.
Play M2 voice file: Triggers a voice file stored on the SD card slot of the M2 (only works when
connected to an M2 system). Specific settings such as zone assignment and
play mode should be configured in M2 voice file settings menu.