Two/twin presses/pressures/pushs ? about a button
Hello,

I want to explain : two presses triggers an alert. (about a button)

What is the more natural ?

Twin or two

and 

presses
pushs
pressures 
button-push 
or another?


Thanks in advance for your help !

I think about "You should press the button twice"

Yes you can say
Push the button twice to trigger an /the alarm.
or
Press the button twice to trigger an /the alarm.
Pressing the button twice will trigger/set off an/the alarm.
Pusing the button twice will trigger / set of the alarm. 

Both push and press are quite natural, probably press is the more natural and everyday though.