FEATURES :Supply Voltage : 12, 24, 48, 110, 230, 415 V AC + 15%, 50Hz. 12, 24, 30, 48, 110, 220 VDC + 15% Tones : Continuous and Intermittent (Both can be given in single unit selection by means of
link provided on backside terminal strip. Volume Control : Continuous adjustable by means of Potentiometer (optional features)