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. The mouse detects movement on a surface and translates it into cursor movement on the screen, making it easier to perform tasks. There are various types of computer mice, including optical mice, which use light to track movement, and wireless mice, which connect to the computer via Bluetooth or a USB receiver. Some mice are designed for specific tasks, such as gaming or graphic design, offering additional features for enhanced performance.