A robust, low inductance electronic package for small area semiconductor chips is provided which includes a flexible polymer film having electronic circuitry on one or more major surfaces, a bumped flip chip integrated circuit attached to the first surface, an array of solder balls to the second surface, and the device encapsulated in a plastic molding compound. Pairs of connecting tubes are mounted on opposite sides of the bottom face of the seat, each connecting tube having a cylindrical opening sized and disposed to receive respective horizontal segments of the backrest support tubes. Furthermore, a correction signal is formed and subtracted from the OFDM signals, until there are no more amplitudes of the OFDM signal above the predefined threshold. ; R3 represents optionally substituted C1-4 alkyl, etc. The GUI can also provide animated on-screen notifications of other events, such as previously-specified dates and times or the end of a television commercial. Financial transaction cards, methods of promoting sales of stored-value cards, methods of using a stored-value card and other embodiments are also disclosed.