The Ware for May 2014 was a “screamer tag” from Checkpoint Systems. The board bears the silkscreen markings “SC-TG001 Ver05”, and was made by the Kojin Company for use in Japan. Presumably, this tag is part of an anti-theft system that activates an alarm when connectivity between a pair of contacts, visible in the photo, is broken; or if a signal is received (or lost) via RF.
A lot of good and very close guesses this time, but I’ll have to hand the prize to Hugo for naming the function quite explicitly. Congrats, email me for your prize!