Special Features:

Material: 1/16-inch thick cold rolled steel; interior finish: cadmium plate; exterior finish: textured paint; color: black; mounting: surface; 24v DC

Properties:

A signaling apparatus which operates electromagnetically and serves to indicate visually, or visually and audibly, whether a current is flowing, has flowed, or has changed direction of flow in one or more circuits. It is usually employed in connection with alarms, electric bells, or buzzers. See also alarm (as modified).