Remotes -

Robert Adler pioneered ultrasonic technology, using mechanical hammers that "pinged" tuned rods at frequencies only the TV could hear.

By the 1980s, infrared (IR) technology became the standard, using invisible light pulses to transmit binary codes to devices. How Today’s Remotes Work Most modern systems rely on one of three main technologies: TV Remote Control—Extraordinary Ordinary Things Remotes

The journey of the remote began in with the Zenith Lazy Bones , which was connected to the TV via a long cable. True wireless freedom arrived shortly after: Robert Adler pioneered ultrasonic technology