In a method of label selection for end-to-end transport of label switched traffic through a communications network between a source node and a destination node, a request message is launched toward the destination node from the source node. The blob identifier outputs a list of blob identifiers on a line-by-line basis. Each of the plurality of data holding circuits includes a first well of the first conductive type and a second well of a second conductive type different from the first conductive type. Further, with the addition of an MP3 player controller into the device, the device can function as a stand alone audio playback device, even while the PC is turned off or is in a hibernating mode. It is particularly adaptable for miniaturized device application.