Home Company Profile Factory Profile Our Products Contact Us News     Speaker Microphone Transducer Buzzer Plate Receiver                      CMB SERIES Product Number CMB SERIES Description Enquiry Send Enquiry Specification Rated Voltage ( V ) 6 ; 12 ; 24 Operating Voltage ( V ) 5-7 ; 10-14 ; 20-26 Rated Current (mA) 20 ; 15 ; 15 Sound Ouput at 30cm (dB) >70 Resonant Frequency (KHz) 0.3-0.5 Operating Temperature Range (℃) -20 ~ +70 Weight 9.5g   Speaker Condenser Microphone Buzzer & Transducer Buzzer Plate Receiver Copyright 2004 by Union Team Limited (Group)