A wireless mouse is a computer input device that allows you to control the cursor on your screen without the need for a physical connection to your computer. Instead of using a cord, it uses wireless technology, typically Bluetooth or a USB receiver, to communicate with your computer. This gives you more freedom of movement and eliminates the hassle of dealing with tangled cords. A wireless mouse usually runs on batteries or can be rechargeable. It provides the same functionality as a traditional wired mouse but with the added convenience of wireless connectivity.