A retrofitted credit card including a certified smart card chip, a display and retrofitted emulation circuitry operative to enable the certified smart card chip to communicate information to the display notwithstanding that the certified smart card chip is configured for communication only with an external readwrite device. Such multipole ion guides comprise an array of pairs of parallel conducting rods, each pair being equally spaced from one another, with the array being bound on its top and bottom as well as its ends by DC electrodes. The trailing end has an axial bore and an intersecting transverse slot.