TRANSDUCER PIEZO 2.9KHZ 78DBA 28VDC; Transducer Function:Alarm; Tones:Slow Pulse; Supply Voltage Min:6V; Supply Voltage Max:28V; Operating Current Max:20mA; Sound Level SPL:78dBA; Resonant Frequency:2.9kHz; Product Range:- ;RoHS Compliant: No