What classic Ronco product of the 1970s was a low-power FM transmitter that allowed users to broadcast their own voices over a nearby radio?

Mr. Microphone

Marketed with the famous catchphrase 'Hey, good lookin', we'll be back to pick you up later!', Mr. Microphone was one of the first popular home karaoke gadgets. It functioned as a low-power pirate radio station, transmitting a signal over a short distance to any standard FM radio tuned to the correct frequency.