Piezo Buzzer, 42mm 5-20V 97DB. Especially suitable for use with the new 701-MDCZ CZone optimized motorized battery switch, this piezo buzzer is also useful wherever a loud single tone alarm is required.. 97 decibel output at 9 Volts. Frequency 2.8 KHz. Voltage 5-20 Volts (Suitable for use with 701-MDCZ battery switch) on 24. volt systems). Power consumption 12mA 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.