Active Buzzer 3V-24V - Intermittent

A simple buzzer for an Arduino, for example to indicate errors. With this active buzzer only an input voltage is required, no frequency. When an input voltage of 3-24V is supplied to the buzzer, the buzzer starts making sound. 
This buzzer is useful when no sound pins are available. Easy to use on a breadboard or prototype board.

Specifications:

• Input voltage: 3V-24V
• Maximum current: 30mA (use a transistor, for example. 2N3904, to connect the buzzer to an Arduino)
• Dimensions: 48 x 30 x 15 mm
• Inside dimensions of mounting holes: 3,2mm diameter, 4,6mm height
• Wire length: 11 cm
• Sound of the buzzer: BEEP-BEEP-BEEP (2x per )