Product details:

The LAMPHUS SoundAler SAAH75 100 Watt Electronic Air Horn Kit comes with the SASP01 100W speaker. Rated at 120 to 130 dB, the kit is capable of producing loud air horn tones, making it the perfect auditory warning air horn for trucks, police, firefighters, EMS and professions alike. The street legal (in most states) air horn tone produced through the bullhorn of the speaker is perfect for volunteers who are not allowed to utilize warning siren tones on their personal vehicles or trucks. With both the speaker and the electronic air horn being waterproof, the SAAH75 100 watt electronic air horn kit can be used on all types of automobile. Momentary switch is included for operation. Air horn can also be activated through the factory horn button.Interchangeable/Compatible with:All automobiles and devices equipped with a 9-30 Volt DC power source.