A printed circuit board assembly includes a PCB, electronic components mounted on the PCB, a shield can provided to block electromagnetic waves of the electronic components, and an insulating layer provided to prevent an electrical short between the electronic components and the shield can, and the insulating layer is sprayed and formed on the shield can. At least one light sensor is included and an electrical circuit controls operation of the mirror unit in response to the at least one light sensor. The handle is attached to a proximal end of the elongated shaft and the compound blade is fixed to a distal end of the elongated shaft. Because the device includes an active transponder, instead of a transponder which relies on magnetic coupling for power, the device has a much greater range. The inner lid can be inserted into a housing opening, with the sealing ring arranged between the inner lid and the wall of the housing opening. An ink jet supply unit connects directly to the printhead which includes a storage chamber for holding ink and for communicating ink to the nozzle chambers.