|Cordless keyboard and wireless mouse or cordless mouse and wireless keyboard.|
Often the two terms, cordless and wireless, are interchangeable.
They mean the connection of the device with the computer is by means of waves in the air rather than by means of cables / cords.
If the mouse and keyboard come out of one box as matched set, they share one USB receiver.
If the mouse and keyboard come in different boxes ( bought separately ), they have separate USB receivers.
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