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