Brother Daniel here.  I did a review on my favorite bullhorns, this company makes megaphones with superior sound quality.  The two models reviewed are the 2230 and the 2215, either one could be purchased at B&H Photo Video.

​Check ou the videos!

These signs are breathable so the wind is not as much an issue.  It has a unique locking system, which allows the signs to be a little bit bigger.  Gospel Gary is a dedicated preacher in the Sacramento, California area.  Please lift up his ministry in your prayers!