Some time ago I ordered the screaming banshee. The horn was large, cumbersome, required mounting in addition to my factory horn. Bad deal. Wasted money. Horn sits on shelf. (Anyone want a deal? $50.00 plus $10.00 for shipping). I instead use a Denali mini sound bomb which works as well as I need it to.
They now have a new horn that looks like the one they should have made in the first place. I am not buying one as I already wasted money on one horn and bought another adequate horn to replace it, but if I did it would probably be this one.