Home Company Profile Factory Profile Our Products Contact Us News     Speaker Microphone Transducer Buzzer Plate Receiver                      EM4020-BC Product Number EM4020-BC Description Ø4.0x2.0(H)mm Enquiry Send Enquiry Specification Sensitivity Range (dB) (0dB=1V/Pa. 1KHz) -44 ± 3dB ; -46± 3dB ;-48± 3dB ;-50 ± 3dB ; Directivity Omnidirectional Impedance Low impedance Current Consumption Max. 0.5mA Standard Operation Voltage 2.0V Sensitivity Reduction Within -3dB at 1.5V S/N Ratio (dB) More than 58dB   Speaker Condenser Microphone Buzzer & Transducer Buzzer Plate Receiver Copyright 2004 by Union Team Limited (Group)