Description:

• Module using S8550 transistor drive
• Operating voltage 3.3V-5V
• With a fixed bolt hole, easy to install
• Small board PCB size: 3.2cm * 1.3cm approx
• When the I/O port input low, the buzzer Sound

Pins Description 3-Wire:

• VCC External 3.3V-5V voltage (can be directly connected with the 5V microcontroller and 3.3V microcontroller)
• GND External GND
• I/O external microcontroller IO port