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 24VAC, 120VAC and 240VAC) and Model 600 (available in 12VDC, 24VDC and 125VDC).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.