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Wednesday, 1 May 2019

Geek Trivia: What Common Electronic Device Was Once Remote Controlled By Ultrasound?

What Common Electronic Device Was Once Remote Controlled By Ultrasound?
  1. Hi-Fi Stereos
  2. Garage Door Openers
  3. Televisions
  4. Turntables

Think you know the answer?



from How-To Geek http://bit.ly/2IUATOa
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