Not sure what to call this thing made over 20 years ago. So, a whatchyamacallit it is. Not to be confused with the Whatchamacallit of Hershey bar in 1978.
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It used some sort of transistor oscillator (now covered in ancient tape) driving an E core iron electromagnet at >20 kHz. It runs from a small 9 V battery and has a reed switch in it to turn on. You bring the box of matches with a hidden magnet just visible here close to turn it on. (do they still make matches?). It induces a current in the coil of unknown turns to drive two LED’s on a smiley face. The LED’s still light up about an inch away. It still works but I have replaced the LED’s after the leads broke and replaced some of the tape. So, remote signalling and remote power transfer 1980 style!
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External links
Whatchamacallit Hershey bar – Wiki
Photo Date: Aug 8, 2004