The INF-WES is an external siren which is designed for wireless communication with the later Infinite* and all Infinite Prime control panels. (*Infinite software versions 2.14 and above).
In the event of an alarm the control panel activates the siren and strobe. The siren is sounded until the end of the cut-off period, programmed at the control panel. After the siren cut-off has expired the strobe continues to flash until the system is disarmed.