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You probably don't remember these but I have a question
(lemmy.world)
This is a most excellent place for technology news and articles.
I was selling smartphones and smartphone accessories when they were just emerging, ending PDA era, and we had FM transmitters - it is powered from car, you plug in your device through aux, and the transmitter sends out the sound in FM, so you can catch it on your effin radio (the frequency were either fixed or selectable). This was the future!