MALLORY SC628 TRANSDUCER, PIEZO, 2.9KHZ, 80DBA, 28VDC Price For: Each Transducer Function: Alarm Tones: Continuous Supply Voltage Min: 6V Supply Voltage Max: 28V Operating Current Max: 18mA Sound Level SPL: 80dBA Resonant Frequency: 2.9kHz External Height: 32.6mm RoHS Compliant: No