Mallory Sonalert Products manufactures and supplies a wide range of audible alarms, buzzers, transducers, piezo's, speakers, microphones, and stacklights. Mallory is the leading innovator of audible and visual indicators with 11 patents, and recent product introductions include our 22 mm panel alarms, 22mm panel alarms with LED's, IEC60601-1-8 medical alarms, and stacklights. As a technology driven manufacturer, Mallory is recognized around the world as the standard for audible and visual warning devices.