Work Voltage: 3.3-5V
With fixed bolt hole for easy installation
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.
VCC : 3.3V-5V
GND : The Ground
I/O : I/O Interface of SCM
1 x Passive Buzzer Module