A level shifting circuit comprises a first low power, low speed level shifter 30 and a second high power, high speed level shifter stage 31. According to the present invention, the expandable modular storage unit includes a backplane capable of being coupled to a host computer system. Buyers may apply for financing, insurance or other related services to receive approval to purchase properties. Trigger and trace information can be captured for the probe points and waveforms representing the captured information can be displayed for analysis. There is provided a second region for loading an applicator with the cosmetic product, the second region being separated from the first region.