Our friends over at the BringtheNoiz Youtube Channel (who uploaded this customer review/testimonial about the Half-Mile Hailer) and UrbanEvangelism preach through the Half-Mile Hailer in several other Youtube videos posted on their channels.
The top portion of the photo is of preachers preaching with the Half-Mile Hailer and the bottom is from the video on supplies they take out to preach.
To see the entirety of the videos, click on these links:
-BLOG POST Everything You Need to Know about the Half-Mile Hailer
-VIDEO: Amplivox Half-Mile Hailer Demonstration
-2 Hailer Testimonials: Auctioneer's PA System Testimony | NCAA Track Meet Half-Mile Hailer Customer Testimonal
-Amplivox on Youtube