439DEX-10AW-R KIDDE COMMERCIAL439DEX Series 10 inch explosionproof Fire Alarm vibrating bellThe Edwards hazardous location fire bell stands out as the premier heavy duty bell designed for hazardous environments currently on the market. It produces a unique, crisp sound devoid of mechanical noise. Unlike vibrating bells, which emit a prolonged, continuous tone, this bell's striker rapidly hits the gong as long as power is supplied. It is specifically engineered for indoor settings that necessitate oversight of signaling circuit field wiring,