Sony's definition of a "single-electric camera" is a camera with full manual operation, fixed semi-lens technology (Translucent Mirror Technology), and an electronic viewfinder. Fixed Translucent Mirror Technology has a significant impact on imaging and is highly controversial, and is only used exclusively by Sony.
Outside generally will be the flat-topped called micro-single, even if the α6000 series like electronic viewfinder, there is a raised warship head called monoelectric, such as Olympus M43 part of the product, although it is not semi-lens technology.