Buzzers are small devices that produce a buzzing sound, often used as signals or alerts. They can be found in various applications, such as in alarm systems, doorbells, and electronic games. Buzzers can be powered by batteries or connected to a power source, and they come in different shapes and sizes. There are two main types of buzzers: active buzzers and passive buzzers. Active buzzers generate sound when electricity is applied, while passive buzzers require an external audio signal to produce sound. Both types are commonly used in electronics, including toys, home appliances, and industrial equipment.