Horns: Type - Vibrating; Application - Hazardous Location; Mounting - Conduit or Surface; Mounting - Connection - (2)3/4", (1)1/2" NPT; Operating Voltage - 24VAC; dB/10-Ft - 101; Enclosure Material - Aluminum; Enclosure Color - Black; Enclosure Rating - NEMA 4X IP66; Size - in - 5.30W x 5.30H x 3.66D; Manufacturer Series - Vibratone