Provided is a toner cartridge having a microcontroller configured to store data necessary to create a message authentication code required by the printer. The tape velocity is adjusted to the maximum velocity. Also, in the preferred embodiment, the present invention includes an actuator for selectively disengaging the second feed needle clearing cam. The first equalizer stage may be preceded by termination circuitry having controllably variable impedance. A third data signal is generated and outputted in synchronization with a second clock signal, and at least one of the first and second data signals is buffered with the buffer. This exchange of energy reduces the ability of the airways to constrict, reduces the resistance within the airway to the flow of air through the airway, reduces mucus plugging of the airways, andor increases the airway diameter.