Home Company Profile Factory Profile Our Products Contact Us News     Speaker Microphone Transducer Buzzer Plate Receiver                      220V SERIES Product Number 220V SERIES Description Enquiry Send Enquiry Specification Rated Voltage ( V ) 220 Operating Voltage ( V ) 220-250 Resonant Frequency (KHz) 50 Operating Temperature Range (℃) -30 ~ +70 Weight 22g Current Consumption (mA) ≦30 Coil Resistance (Ω) 6500 ± 10% Sound Ouput at 10cm (dB) ≧80   Speaker Condenser Microphone Buzzer & Transducer Buzzer Plate Receiver Copyright 2004 by Union Team Limited (Group)