Piezo Buzzer - PCB Mount Goli Buzzer 5-12V
This is a small Buzzer, which can be mount on PCB. It has two pins; the bigger pin should be connected to positive supply and shorter one should be connected to ground connection. Operating voltage range is 5-12V. If you provide provide square wave of 5V, it will create a good sound. for a optimum sound quality provide 2-4KHz wave.