A computer mouse is a handheld device used to interact with a computer. It typically has two buttons and a scroll wheel, allowing users to click, select, and navigate through software and files on their screens. The mouse moves in response to the user's hand movements, translating them into cursor movement on the display. Most computer mice connect to a computer via a USB cable or wirelessly using Bluetooth. They come in various shapes and sizes, designed for comfort and ease of use. Some advanced models include additional features like programmable buttons and customizable lighting for enhanced functionality.