Alarm Component Piezo Buzzer PK-27A35ER Type:PK-27A35ER contact with us: yxl(at)duoxin(dot)com Oscillation Frequency (KHz) 3.5 ±0.5 Operating Voltage (Vdc) 3 ~ 24 Rated Voltage (Vdc) 12 Current Consumption (mA/max.) 15 at Rated Voltage Sound Pressure Level (dB/min.) 95 at 30cm at Rated Voltage Tone/Pulse Rate Constant Operating Temperature (℃) -20 ~ +70 Storage Temperature (℃) -30 ~ +80