The speaker is a P.O. Box 306 in a two-color plastic case. Sample 1987.

From the collection of items on the history of equipment transferred by "BashinformLiaison" PJSC. Issued first in 1984. Makeyevsky Factory of Electric Impulse products "Impulse". Calculated to the 30 V line. The range of the audible frequencies is 160-6300 Hz. Average sound pressure of 0.25 Pa

Creation time: 1987 yод.

Place of creation: g. Makievka.