A reflection speaker assembly includes a cylindrical body having an aperture, a reflector, a tweeter type speaker for higher frequencies and a midrange type of speaker for middle frequencies. The method comprises exposure of an organ to periodic action of vacuum oscillations and a light field and is characterized in that the organ is additionally exposed to low-frequency pulsed magnetic field and the light exposure of different wavelengths is combined. Recesses are formed between the thin plate sections and the fixing section andor the movable sections. The combined display device and eyepiece module is releasably connected to the rest of the viewfinder and extensions can be installed for modifying the view position without affecting the image viewing through the eyepiece. Each multi-user group node is an extension of a Group node. A vaccine composition containing the complex, a corresponding pharmaceutical preparation and a method of preparing the complex are also disclosed.