100db High Decibel Fire Alarm Bell, 4 Inch Stainless Steel Internal Strike Type Electric Bell Compatible with Fire Alarm Systems for Emergency Evacuation About this product: Hard metal shell, durable and resistant to damage. Sound reaches 100dB, suitable for areas up to 600-800 square meters, providing wide coverage and enhanced safety. Pure copper electromagnetic coil ensures reliable performance, no electromagnetic interference, strong magnetic grip, stable operation, and long service life. Surface coated with electroplating technology for improved corrosion resistance and reduced risk of rust. Wired design with external power supply, easy to install on walls, ceilings, or other surfaces. Product Specifications: Condition: New Color: Red Material: Metal Size: 4 inches (100mm) Power Mode: External Voltage: 220V Alarm Volume: 100dB Surface Treatment: Electroplated Package List: 1 x Fire Alarm Buzzer