Electromegaphone `` EM-2M ''.
Acoustic systems, passive or active, as well as electro-acoustic units, hearing aids, electric megaphones, intercoms ...Electric megaphonesThe EM-2M electric megaphone has been produced since 1975. The electric megaphone is designed for short-term loud and directional transmission of voice messages within a radius of up to 300 meters. Brief technical characteristics: Rated output power 4 W. The range of reproducible frequencies is 300 ... 3000 Hz. EM was produced until 1995.
