Wireless Atari 2600 controllers (1983)
Atari's solution was to spin off a set of radio-controlled joysticks, which could be used across the room without a cable. The radio base station they used plugged into the console and a wall power jack, and would allow the controllers to send information even when out of line of site of the base station.
Atari's use of radio frequency instead of infrared led to many modern-day controllers taking advantage of the technology, including Nintendo's Wavebird and the Xbox 360. Other controllers, like Nintendo's Wiimote and the Playstation 3's dual-shock series, use Bluetooth instead, though they retain the capability to play without a line of sight to the console.
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