Piezo Buzzer, 42mm 5-20V 97DBEspecially 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 VoltsFrequency 2.8 KHzVoltage 5-20 Volts (Suitable for use with 701-MDCZ battery switch) on 24 volt systems)Power consumption 12mA at 12 VoltsWARNING: 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.