A megaphone is a portable device used to amplify sound, making it easier for people to hear a speaker from a distance. It typically consists of a cone-shaped body that directs sound waves outward, and it can be powered by batteries or operated manually. Megaphones are commonly used in various settings, such as sports events, rallies, and emergency situations. These devices are often made from lightweight materials like plastic, making them easy to carry. Some megaphones also include features like a built-in microphone and volume control, allowing users to adjust the sound level as needed. They are popular among coaches, event organizers, and emergency responders.