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 communicates with the computer through a wired or wireless connection. There are various types of computer mice, including optical mice that use light sensors and laser mice that use laser technology for more precise tracking. Some mice are designed for specific tasks, such as gaming or graphic design, offering additional buttons and customizable features to enhance user experience.