Home Company Profile Factory Profile Our Products Contact Us News     Speaker Microphone Transducer Buzzer Plate Receiver                      TCT40-12R1 Product Number TCT40-12R1 Description Enquiry Send Enquiry Specification Resonant Frequency (KHz) 40 Sensitivity (odB=v/Pa)(min) -70dB Capacitance( ± 30% PF) 2000   Speaker Condenser Microphone Buzzer & Transducer Buzzer Plate Receiver Copyright 2004 by Union Team Limited (Group)