Hurricane air horns pack powerful sound decibel output in a unique one piece flush mount design. Meets requirements for boats under 12 meters in either in 12VDC or 24VDC. The horn and integrated air pump are easy to install eliminating the need to install air lines. The output is typical marine low tone (300 Hz) and powerful 120 dB sound output. Choose white plastic or chromed grille in 12 V and 24 V configurations.