1Durable, the volume is up to 120DB, making it easy to pass signal volume over long distances. 2Suitable for all kinds of cranes, ships, fire alarm systems, as well as agriculture, factories, markets, schools, entertainment venues and other fields. 3AC110V, AC240V, DC24V, DC12V optional, you can install the alarm in different places and different environments. 4The shell material is made of aluminum and steel materials. The material is hard and not easy to be deformed. The surface is painted and treated to resist corrosion and rust. It is durable. 5Large heat-dissipating sound-dissipating port The combination of heat-dissipating and amplifying sounds can be used to make the sound transfer farther.
