Nominal frequency:40 +/- 0.5 khz
Storage temperature:-25 degrees Celsius to 80 degrees Celsius, operating temperature:-20 degrees Celsius to 80 degrees Celsius
Sensitivity:-75 ubar
SPL:>/=108 (10v/30cm/sine wave)
Directionality:45 degrees
1khz capacitance:1800 +/- 30per cent
Detection range:0.3 to 3.5
Maximum input voltage:140 vp-p
Material: Aluminium