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Can you wirelessly connect a controller to steam?
Answer:
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Steam Link
The Steam Link allows you to stream games from the Steam Library on your PC to any TV in your home. The technology takes advantage of the horsepower you already have in your home, streaming from your current gaming computer by mirroring its experience to your TV.
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Steam Link Hardware - Steam Support
. To pair the PS4 controller wirelessly with the Steam Link: Using another input device (wired mouse or controller), go to the Bluetooth settings. Simultaneously hold the PS and Share button on the PS4 controller until it enters pairing mode and starts flashing.