Portable Loudspeaker System: The Most Affordable Loud Hailer Today
George AilsaA loud hailer is a megaphone, a portable electronic device. It is used to boost the sound of a person's voice to make it louder and more audible at a…
A loud hailer is a megaphone, a portable electronic device. It is used to boost the sound of a person's voice to make it louder and more audible at a…