TV-B-Gone
Used by 2 peoplecornfieldelectronics.com ↗
“Some highlights: I invented TV-B-Gone, a remote control keychain that turns off TVs in public places.”
Mitch Altman Interview, Inventor · via Uses This 
“In my electronics kit, I have a soldering iron which I use to construct everything from a TV-B-Gone to my own electrical component jewelry.”
Laura Khalil Interview, Marketer, puzzler, robot builder · via Uses This