①. Equipped with a 95dB alarm and rate waterproof design, this 6 inch electric fire alarm bell delivers penetrating emergency alerts for both indoor and outdoor use, suitable for 6V, 24V, 110V, or 220V power sources. ②. Featuring a copper metal mixing housing and optimized structure, it ensures long distance sound propagation with enhanced durability against impacts and harsh weather conditions. ③. Suitable for school administrators, homeowners, and facility managers seeking emergency notification systems in crowded spaces like classrooms, warehouses, or retail complexes. ④. Operates in corridors, industrial zones, parking lots, and outdoor areas exposed to rain or snow, providing defense against fire hazards across residential and commercial properties. ⑤. Engineered with erosion resistant ABS components and simplified mounting brackets, this safety alarm requires minimal maintenance while offering years of service as an early warning device. ⑥. Specifications: Component: Copper, metal, ABS; Size: about 150x150mm/6x6inch; Power supply: 6V/12V/24V, 110V/220V optional; Sound: 95dB; Power supply: multiple options available. ⑦. Package Includes: 1xSecurity Alarm. ⑧. Note: 1. Please allow 1-2cm errors due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.