50PCS Piezo Piezoelectric Passive Buzzers Speaker Alarm with Lead Wire Description: Rated voltage: 12V Operating voltage: 1-30V Rated current(maz): 2mA Mini sound output at 10cm: 80dB Resonant Frequency: 4000+or-500HZ Housting material: ABS Diameter: 17mm Package Included: 50 X Passive Piezo Buzzer Please Note: Passive Piezo Buzzer can't make sound when you apply power, active buzzer can do that. Here is the link for active buzzer：https://www.ebay.com/itm/233721752345.
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