Loud horn without the air?

[Dick Renaud]

It is the same sound you hear on firetrucks and EMT units. It is very loud. You can hook it up to you standard horn button. If you hold down the button you get a sustained blast.
This is the same one I have on a full Welen siren unit. It gets the attention of traffic. I use it to clear intersections on emergency runs.
The speaker is easy to mount behind the grill.