Ear phone '' TM-2 ''.
Headphones, headphones, headsets ...The earphone "TM-2" has been produced since 1961 by the Tula plant "Oktava". Long-liver in production. With indices A, B, B, M, etc. in addition to the Octava plant, it was produced by other plants in the country, including the Moscow plant Ritm until the early 90s. Designed for individual listening to sound from household equipment with a Ш2П socket. Frequency range 200 ... 3000 Hz. Frequency response 18 dB. Average sound output is not less than 8 Pa.
