Amazon.com : Pyle Portable Battery Operated Megaphone - Mega Horn Loudspeaker with Built-in Siren and Dynamic Microphone - Ideal for Cheering at Football Games, Mini Bullhorn for Kids and Adults : Sports
Beyerdynamic TG-I57C Cardioid Condenser Clip-On Horn Microphone | Full Compass Systems
Shure WB98H/C Wireless Horn Microphone
Microphone Comparison for Recording Solo Horn - YouTube