www.securitymagazine.com/articles/76718-megaphone-1

Megaphone

May 7, 2003
From TOA Electronics, the ER-604W shoulder megaphone is compact and lightweight with a detachable microphone, 10-watt amplifier and whistle tone. Other features include two inputs for optional headset and/or hand-held microphones plus a line input for a CD player or other sound source. The ER-604W is a convenient and affordable "tool" for tour guides, product demonstrators and sporting event announcers.