MB20 Piezo Buzzer

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MB20 Piezo Buzzer specification sheet: Minimum Sound Level 85 dB; Oscillation Frequency 4 kHz ± 500 Hz; Operating Voltage 1.5 to 27 VDC; Current Consumption Maximum 15 mA; Tone Continuous; Mounting PCB Type; Diameter 23 mm; Height 18 mm