Contextual Info: CANOPUS External Drive Piezo Transducer AC CPT2211 Canopus Part no. Min sound Output (dBA) Rated Voltage (V) Max Input Resonant Voltage Frequency (V) (Hz) Capacitance (pF) Operating Tempature o ( C) Housing Weight (g) CPT2211C20TP 70 AT 10cm 3 Vp-p 30 Vrms