Active Buzzers (Small) (3V 5V 9V 12V 24V DC)
$60.42
$88.21
Active Buzzer is the slightly taller one, with a solid, plastic coat on the bottom and a label that says to remove it after washing. Only requires an external DC voltage to make it sound (batteries or USB from Arduino) An active buzzer has a built-in oscillating source, so it will make sounds when electrified.
Buzzers & Speakers