This motorized alarm is made with a robust permanent magnet motor, which guarantees years of reliable service and produces a loud sound suitable for short duty cycles. Optional Voltage Specifications The engine drive alarm is available in AC220V 110V DC24V DC12V voltage specifications, suitable for all vehicles equipped with 12V systems. Easy to Install The siren can be easily installed with a simple two-wire connection. And the angle can be adjusted, and the sound can be directed exactly where you want it. Suitable for many occasions It is suitable for signal transmission in small elevators, transport vehicles, small ship machinery warehouses, etc., and is suitable for places requiring safety warnings such as construction sites, substations, factories, and natural disasters. High-quality shell: The shell is made of high-quality ABS and steel. The material is hard, not easy to deform, the surface is painted, anti-corrosion and anti-rust, and durable. Sound amplification: Large sound