PA system for markets

One puzzle that I never could figure out at the markets that I ran was how to get a decent event PA system that was not thousands of dollars or too weak to work. This is one I saw someone use a few months back and remembered it when I saw it in a news story this weekend.
Certainly, demonstrating chefs need them (even when they think they don’t!), market managers should wear one when doing small group talks and maybe it’s even something that could be offered to market vendors to do an on the spot demonstration (filleting fish or shucking properly?) or when offering “a health minute” at market….,-USB-Waist-Band-Portable-Pa-System-With-A-Headset-Microphone-wBuilt-In-Rechargeable-Batteries-(Color-Silver)