Electromegaphone `` EM-12 ''.
Acoustic systems, passive or active, as well as electro-acoustic units, hearing aids, electric megaphones, intercoms ...Electric megaphonesThe EM-12 electric megaphone has been produced since 1990. EM is designed to amplify speech at a distance of up to 300 m and to send a siren. Rated output power 6 W, maximum 12 W. Powered by 373 batteries with a total voltage of 16 V. Duration of continuous operation from a set of batteries 10 hours.
