A wireless mouse uses radio frequency (RF) broadcasts to work. The mouse contains a transmitter, which sends radio signals about the mouse's actions to the computer. The transmitter is very lightweight and is low-powered enough to run on batteries. The computer is connected to a radio receiver, which receives the mouse's RF transmissions, decodes them and sends the data along to the mouse driver software. The receiver can be an external device plugged into a computer or an internal component.
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