With more than 50 years of fire service tradition and history, the Federal Signal Q-Siren® is the most recognized siren in the fire industry. This electro-mechanical siren is a beautifully streamlined, chrome-plated siren designed to provide unparalleled reliability for long-life operation. When mounted on emergency vehicles, the Q-Siren delivers a powerful 123 decibel warning sound at 10-feet, more than any other electro-mechanical siren. The distinct sound of the Q-siren is a registered trademark of Federal Signal Corporation.