Home Company Profile Factory Profile Our Products Contact Us News     Speaker Microphone Transducer Buzzer Plate Receiver                      LET8540S Product Number LET8540S Description SMD type; Ø85x4.0(H)mm; Enquiry Send Enquiry Specification Rated Voltage ( V ) 3 Operating Voltage ( V ) 2~4 Rated Current (mA) ≦90 Sound Ouput at 10cm (dB) ≧87 Coil Resistance (Ω) 16 ± 3 Resonant Frequency (KHz) 2.7 Operating Temperature Range (℃) -20 ~ +70 Storage Temperature Range (℃) -30 ~ +80   Speaker Condenser Microphone Buzzer & Transducer Buzzer Plate Receiver Copyright 2004 by Union Team Limited (Group)