Headphones '' Tone-2 '' and '' Tone-2A ''.

Headphones, headphones, headsets ...Headphones "Ton-2" and "Ton-2A" have been produced since 1961 by the Tula plant "Oktava". Designed for use with various radio equipment. Phones of the "TON-2A" type differ from the phones "TON-2" by the absence of a volume control and an input resistance for direct current of 100 Ohm, while basic telephones have a resistance of 3.2 kOhm. Both earphones were available with or without rubber earbuds. The bow of the phones also had several versions.