The Thunderbolt is an electro-mechanical outdoor warning siren that was manufactured by Federal Signal Corporation from 1952 until its production ended in 1990. It is a unidirectional, rotating siren with a large square-shaped horn, and can come in various colors, usually yellow, by request.
The Thunderbolt is an electro-mechanical outdoor warning siren that was manufactured by Federal Signal Corporation from 1952 until its production ended in 1990. It is a unidirectional, rotating siren with a large square-shaped horn, and can come in various colors, usually yellow, by request.
Source: Wikipedia "Thunderbolt (siren)" · CC BY-SA 4.0
Share this article: X · Bluesky