Descriptions:

Work Voltage: 3.3-5V
With fixed bolt hole for easy installation
PCB Dimension: 3.3 x 1.3cm
DuPont line length: 21cm
Module adopts 9012 transistor drive

Feature:

No oscillation source, need square wave (frequency 2K-5K ) to drive.
Sound frequency control, you can make a “do re mi fa sol la si” effect.

Pin Definitions:

VCC : 3.3V-5V
GND : The Ground
I/O : I/O Interface of SCM

Package included:

10 x Passive Buzzer Module
10 x 3pin DuPont line