A buzzer is a simple electronic device that produces a buzzing sound when activated. It is commonly used in various applications, such as alarms, doorbells, and game shows. Buzzers can be powered by batteries or connected to electrical circuits, and they come in different sizes and sound frequencies. In many cases, buzzers serve as indicators or alerts. For example, in a game show, a buzzer may signal that a contestant has answered a question. Similarly, in a security system, a buzzer can alert homeowners to unauthorized entry. Their straightforward design makes them easy to use and install.