Inside, the spacecraft featured two-toned colours (designed by interior design architect, Galina Balashova, carrying over her concept of comforting interior décor from Soyuz and Salyut),   fluorescent lighting, and one toilet. The module was launched unmanned, and first crewed by the two members of EO-1, launched aboard Soyuz T-15 on 13 March 1986. After 52 days, they left Mir and visited Salyut 7 for 51 days, then returned to Mir for 21 additional days, before returning to Earth on 16 July 1986.
The spacecraft's interior included two-tone colors (designed by Galina Balashova, who carried over her soothing design from Soyuz and Salyut), fluorescent lighting, and one toilet. The module was launched without a crew; the first occupants were the EO-1 team aboard Soyuz T-15 on March 13, 1986. After spending 52 days there, they visited Salyut 7 for 51 days before returning to Mir for an additional 21 days and then departing Earth on July 16, 1986.