TMB12A12 active buzzer

A buzzer is an audio signal device that may be mechanical, electromechanical, or piezoelectric. A buzzer is an integrated structure of electronic transducers, DC power supply, and is widely used in computers, printers, copiers, alarms, electronic toys, automotive electronics, telephones, timers, and other electronic audio products. Typical uses of buzzers include alarm devices, timers, and confirmation of user input such as a mouse click or keystroke. An active buzzer has an internal oscillation source and sounds immediately after voltage is applied. A simple way to distinguish between an active and passive buzzer is by the type of battery they are powered by. Connect the positive and negative terminals correctly to the battery, if the buzzer sounds, then the buzzer is active, otherwise it is passive