Product Name : Electric Bell Rated Voltage : AC 220V Top Diameter : 100mm / 4 inch;Base Diameter : 115mm/ 4.5 inch Overall Height : 5cm/ 2 inch;Material : Metal, Plastic Color : Red;Weight : 378g Metal bell and plastic base, round, designed with 2 wires.Suitable for residential building, office, factory, schools, shops, hotel, factory, public places, etc Package Content : 1 x Fire alarm bells Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.