Partnumber NU40C16T-1 UsingMethod Transmitter Construction Openstructuretype Centerfrequency 40.0 1.0KHz Soundpressurelevel 112dBmin. Sensitivity Capacitance 2400Pf 20% Maximuminputvoltage 60Vp-p Directivity 60 15 (-6dB) Operatingtemperature -20 C~+70 C StorageTemperature -40 C~+85 C Weight 2.2g 各種尺寸大小都有,分立式的,一體化的 大量現(xiàn)貨.