Home Company Profile Factory Profile Our Products Contact Us News     Speaker Microphone Transducer Buzzer Plate Receiver                      RMB SERIES Product Number RMB SERIES Description Enquiry Send Enquiry Specification Rated Voltage ( V ) 6 ; 12 ; 24 Operating Voltage ( V ) 4-8 ; 8-16 ; 20-28 Sound Ouput at 30cm (dB) > or = 85 Resonant Frequency (KHz) 0.3 - 0.5 Operating Temperature Range (℃) -30 ~ +70 Weight 17g Current Consumption (mA) <40   Speaker Condenser Microphone Buzzer & Transducer Buzzer Plate Receiver Copyright 2004 by Union Team Limited (Group)