The Kele Product AIS-24A Alarm Indicator with Silence Switch is a 24 VAC device designed to provide clear visual and audible notification of alarm conditions in HVAC systems. It operates by receiving a low-voltage alarm signal and activating its indicator to alert users when a monitored condition requires attention. The integrated silence switch allows the audible alarm to be muted wh... https://www.partshnc.com/kele-ais-24a-alarm-indicator-with-silence-switch-24vac