https://sirennet.com/store/product/federal-signal-q2b-electro-mechanical-siren "It's not a fire truck unless it's got a Q-Siren." With more than 50 years of fire service tradition and history, the Federal Signal Q2B 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 Q2B delivers powerful warning sound, more than any other electromechanical siren. A heavy-duty coas