Piezo Buzzer, 30mm 5-30V 85DB. Especially suitable for use with the new 701-MDCZ CZone optimized motorized battery switch, this piezo buzzer is also useful wherever a single tone alarm is required.. 85 decibel output at 9 Volts. Frequency 3.5KHz. Voltage 5-30 Volts. Power consumption 9mA at 12 Volts. WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.