“Do these devices require line of sight to the dongle? My computer is on the floor next to my desk, and there is no direct line of sight to the keyboard and mouse. Thanks!”

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• I do not believe so. I have mine over five feet away from my tower, and the dongle is on the back side away from me. Have had no problems with it.

  Answered by Mpow 5 years ago

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• Hello Daniel. The MK540 uses 2.4GHz wireless to communicate with the USB receiver. It does not require line of sight.

  Answered by Logitech 5 years ago

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