About us

E&J Warning Systems was originally founded in 2020 by Eli and Jim under the name Monkey Signals. What began as a hobby, building cardboard sirens for fun during the 2020 Coronavirus pandemic, quickly grew into something more. In 2024, the company was rebranded as E&J Warning Systems, shifting its focus to designing and producing fully functional miniature sirens. By 2025, the business had expanded further to include the installation of industrial sirens and fire safety equipment. Today, E&J Warning Systems is committed to producing high-quality products and delivering reliable, professional installations.