TRANSDUCER PIEZO 2.9KHZ 85DBA 28VDC; Transducer Function:Alarm; Tones:Medium Pulse; Supply Voltage Min:16V; Supply Voltage Max:28V; Operating Current Max:40mA; Sound Level SPL:85dBA; Resonant Frequency:2.9kHz; Product Range:- ;RoHS Compliant: Yes