 Oktava sells most of its products to the United States and Europe.In June 1927, the electronics plant that became Oktava opened in Tula, producing radio components, and in four years grew from a local workshop into a large plant supplying microphones across the Soviet Union, attached to the Ministry of Postal Services.Around 1932, the plant focused on the production of acoustical-electrical transducers, microphones and loudspeakers, and their first prototype tuned radio frequency receiver was produced that year.