Piezo sound transducer,Min.
Sound Output at 10cm : 85 dBOperating Voltage : 1~20 Vp-pResonant Frequency : 4.0 ±0.5 KHzMax.
Current Consumption : 5 mACapacitance at 1kHz : 14.000 +/-30% pFOperating Temperature : -30~+85 °CStorage Temperature : -40~+90 °C