Home Company Profile Factory Profile Our Products Contact Us News     Speaker Microphone Transducer Buzzer Plate Receiver                      NMBII SERIES Product Number NMBII 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) ≧85 Resonant Frequency (KHz) 300~500 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)