Federal Signal's Vibratone Bells Models 504WB and 506WB are completely assembled and include the gong, vibrating AC mechanism, and the gasketed back box. These assemblies feature heavy duty, industrial grade housings and powder–coat paint treatments for added durability and performance.

These bells are offered in 120VAC or 240VAC versions.

The four inch, heavy duty gong, produces 98dB @ 10' (107dB @ 1m). The six inch heavy duty gong produces 100dB @ 10' (109dB @ 1m). Vibratone gongs are tempered to give them superior output and long lasting durability.

The Models 504WB and 506WB both contain internal terminal blocks which simplifies installation. This method also allows for an uninterrupted, single run of wiring.

These bells are UL and cUL Listed, CSA Certified and FM Approved. The entire assembly is rated for Type 3R.