Vibratone heavy duty bells allow for greater flexibility and selection by utilizing the modular approach to combine gongs and mechanisms.Three gong sizes are available-Model A4 (4" dia.), Model A6 (6" dia.), and Model A10 (10" dia.). Each size larger gong produces a different tone and a higher dBa output. Vibrating bells produce a continuous ringing sound when voltage is applied.Two vibrating mechanisms are available-Model 500 (available in 24V AC, 120V AC and 240V AC) and Model 600 (available in 12V DC, 24V DC and 125V DC).Vibratone bells can be used in any industrial application, whether to signal danger or for start and dismissal. A variety of mounting accessories will accommodate almost any environment.