The Wallflower 360, a premium received with Gerard Armbruster's workhorse handheld audio recorder, was introduced in the Extruding America episode entitled Preparation for a Journalistically Superior Report, and was described as "a recording device so sensitive it can even record your thoughts and dreams."  It promised the ability to "constantly record your entire life."  It was discarded on a scrapheap but is apparently still in operation, as evidenced here. - Editor*

*Note - The possibility of a listening device with the power of the Wallflower 360 was being investigated as early as 1949 and outlined in scientific literature (see AUDITORY NATURE IN MOLECULAR STRUCTURES by Folger Edelstein, Yuma University Press 1949) and in extrapolative classical works (e.g. THE BED CHAMBER DREAMS OF TIN TIN LIU by the 13th century Chinese poet Ben Joe).