Features: Equipped with a powerful 120dB alarm and multi defense features (fire, theft, quakes), this 24V magnetic alarm delivers stable security through strong ABS/metal construction for homes and commercial spaces. The shock resistant housing operates on low electric power with easy magnetic installation, while compatibility with detectors and door sensors enables customizable security systems expansion. Perfect for homeowners, apartment dwellers, and business owners requiring hearable intrusion alerts and emergencies warnings in residential/commercial environments. Mount near window, doors, or vulnerable entry points to activate piercing alarms during break in attempts or disaster scenarios like fires or quakes. Engineered for continuous operate in harsh conditions, this security alarm maintains stable performances with IP54 rate durability against impacts and environmental wear. Specifications: Component : ABS, Metal Size: about 52x50mm/2.04x1.96inch Working electric : 24V Package Includes: 1xMagnetic Security 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.