An apparatus relates generally to multiband power modulation. The reactor can include a plurality of spaced apart internal trays disposed at different elevations in a downwardly sloping elongated tubular member. During operation, the instruction decode unit may obtain and decode instructions which are to be executed by the processing unit. The first application is enabled when host battery supply is available, and the second application is enabled when no host battery supply is available. The display apparatus also includes a clear, plastic enclosure shaped to accommodate the display apparatus within the enclosure.