1.Work Voltage: 3.3-5V.

2.With fixed bolt hole for easy installation.

3.PCB Dimension: 3.3 x 1.3cm.

4.DuPont line length: 21cm.

5.Module adopts 9012 transistor drive.

6.No oscillation source, need square wave (frequency 2K-5K ) to drive.

7.Sound frequency control, you can make a “do re mi fa sol la si” effect.

8.VCC : 3.3V-5V.

9.GND : The Ground.

10.I/O : I/O Interface of SCM.