Externally driven type, requiring an external oscillator circuit.

Operating voltage (V) p-p:  3 to 30
Operating current (mA): 2
Oscillating frequency (kHz): 3.8 ± 0.5
Sound output at 30 cm. 9V p-p (db) min: 75
Temp. range: -20°C to +65°C
Dimensions: 24mm dia. x 5mm h.