GM 4002 Ding Dong Door Bell operates on 240V AC power to provide consistent and dependable sound output. It produces a loud twin-tone ding dong sound that is easily audible across multiple rooms. The durable body is built with fire-retardant material to enhance safety during long-term use. Its compact construction allows for quick and easy wall-mount installation without occupying much space. Designed for energy-efficient operation, it supports regular use with minimal power consumption. Finished in a clean white color, it blends well with most home interior styles.