Apparatus and instruments for conducting, switching, transforming, accumulating, regulating and controlling electricity; apparatus for recording, transmission and reproduction of sound, images or data, in particular reception equipment for satellites reception and terrestrial reception of sound, images and data, especially for mobile use in caravans, vehicles and ships, and their parts, as far as included in this class, including satellite receivers, aerials, TV-equipment, video apparatus; equipment for manual and electronic control of satellite aerials and terrestrial aerials; photovoltaic elements and solar collectors for power generation, in particular for mobile use in caravans, vehicles and ships; equipment for electronic control of photovoltaic elements and solar collectors; data processing equipment and computers, in particular for storage and processing of image and sound; computer software (recorded or for downloading)