Gikfun Active Buzzer 3V Magnetic Long Continous Beep Tone Alarm Ringer for Arduino (Pack of 10pcs) EK2148 Input Voltage: 2-3.5V Current: &lt;25mA Frequency: 2300 +/-500Hz Pack of 10pcs Input Voltage: 2-3.5V Current: &lt;25mA Frequency: 2300 +/-500Hz Pack of 10pcs