The audible sounder is an optional feature. You may or may not have one on site.
The audible sounder notifies those in the vicinity if a sensor alarm is triggered.
It connects to the WARP via a cable. See image 1.
To silence the audible sounder, press the centre membrane button on the WARP once.
An icon will be displayed on the WARP display panel to indicate its status. See image 2.