Home Company Profile Factory Profile Our Products Contact Us News     Speaker Microphone Transducer Buzzer Plate Receiver                      MMB SERIES Product Number MMB SERIES Description Enquiry Send Enquiry Specification Rated Voltage ( V ) 1.5 Operating Voltage ( V ) 1 ~ 2 Rated Current (mA) 15 max. Resonant Frequency (KHz) 300 ~500 Operating Temperature Range (℃) -20~+60 Weight 4.1g Sound Ouput at 10cm (dB) 80min   Speaker Condenser Microphone Buzzer & Transducer Buzzer Plate Receiver Copyright 2004 by Union Team Limited (Group)