Features: The DC220V emergencies Security alarm delivers 120dB piercing alarms for fire, theft, and quakes defense , featuring shock resistant ABS/metal construction and direct 220V power compatibility. Engineered with strong ABS and metal components, this anti theft alarm withstands harsh conditions while offering tool easy installation through standard 220V outlets. Perfect for homeowners, business operators, and property managers seeking stable emergencies alerts without professional installation hassles. Designed for versatile deployment in apartments, offices, shopping centers, and residential buildings requiring fast hearable security warnings. Integrates seamlessly with existing safety systems like detectors and door sensors, creating a layered defense internet against emergencies through its expandable connectivity. Specifications: Component : ABS, Metal Size: about 52x50mm/2.05x2inch Working electric : 220V Package Includes: 1xSecurity Alarm alarm note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.