Electromegaphone `` ECHO-2M ''.
Acoustic systems, passive or active, as well as electro-acoustic units, hearing aids, electric megaphones, intercoms ...Electric megaphonesThe ECHO-2M electric megaphone has been produced presumably since 1989 by the Radiodetal Kharkov plant. Designed to enhance speech and ensure normal audibility at a distance of up to 70 meters under favorable conditions. It can be used when serving sports events, on camping trips, at exhibitions, on city tours, etc., as well as as a sound amplifier when an electrical signal is supplied to its input from a receiver, tape recorder, etc. Supply voltage 12 ... 15 V.
