Model	FBPB4311A	FBPB4311B	FB4311C	FB4311D
Rated voltage	230VAC	230VAC	12VAC	230VAC
Operating Voltage	200~240VDC	200~240VAC	8~15VAC	200~240VAC
Max.Rated Current	20mA at 230VAC	20mA at 230VAC	20mA at 12VAC	20mA at 230VAC
Min.Sound Pressurel Level	80dB at 230VAC/60cm	80dB at 230VAC/60cm	80dB at 12VAC/60cm	80dB at 230VAC/60cm
Resonant Frequency	2.±0.5KHz	2.9±0.5KHz	2.9±0.5KHz	2.9±0.5KHz
Operating Temperature	-20~+60°C	-20~+60°C	-20~+60°C	-20~+60°C
Tone Nature	Continuous	Slow Pulse	Slow Pulse	Fast Pulse