Headquartered in a 22,000 square foot facility in Indianapolis, Indiana, Mallory Sonalert Products, Inc. is a leader in the manufacture and development of Sonalert? electronic audible signal products. The company has made its trademarked Sonalert line for over thirty years. In addition to Sonalert products, Mallory also distributes a full range of audible signal devices including transducers, indicators, sirens, buzzers and related hardware to a broad range of customers in industrial, military and consumer electronic markets.