A control unit for controlling an electrical apparatus, comprising a control device adapted to be wall-mounted and an actuation plate adapted to be secured to said control device, wherein the actuation plate comprises: • a support frame and a relative cornice to which a plate made of a transparent material is secured, • a cover surface, defined by the plate, which is at least partially transparent, said cover surface being disposed, in use, to cover the control device and a portion of a wall on which the control device is mounted, • a sensor member adapted to detect contact with a user's finger, and wherein said control device comprises: • a base structure adapted to fasten said control device to the wall, • a terminal block adapted to electrically connect the control unit to the electrical apparatus, • a lighting device designed to light, in use, an inner surface of said actuation plate opposite said cover surface at a touch zone; wherein said control device further comprises an abutment member comprising an edge designed to abut on said inner surface, said abutment member being connected to said base structure in such a way as to enable the edge at least to move in translation in a fastening direction, said fastening direction being a direction of pressing said actuation plate on said control device, and wherein said control device further comprises a retaining member capable of preventing said actuation plate from moving with respect to said base structure at least in a direction opposite said fastening direction and resilient means designed to counter the displacement of said abutment member in said fastening direction, wherein said touch zone is adjacent to said edge, said abutment member comprising a transparent surface associated with a graphical symbol facing said lighting device. • a support frame and a relative cornice to which a plate made of a transparent material is secured, • a cover surface, defined by the plate, which is at least partially transparent, said cover surface being disposed, in use, to cover the control device and a portion of a wall on which the control device is mounted, • a sensor member adapted to detect contact with a user's finger, and wherein said control device comprises: • a base structure adapted to fasten said control device to the wall, • a terminal block adapted to electrically connect the control unit to the electrical apparatus, • a lighting device designed to light, in use, an inner surface of said actuation plate opposite said cover surface at a touch zone; wherein said control device further comprises an abutment member comprising an edge designed to abut on said inner surface, said abutment member being connected to said base structure in such a way as to enable the edge at least to move in translation in a fastening direction, said fastening direction being a direction of pressing said actuation plate on said control device, and wherein said control device further comprises a retaining member capable of preventing said actuation plate from moving with respect to said base structure at least in a direction opposite said fastening direction and resilient means designed to counter the displacement of said abutment member in said fastening direction, wherein said touch zone is adjacent to said edge, said abutment member comprising a transparent surface associated with a graphical symbol facing said lighting device.