Home Company Profile Factory Profile Our Products Contact Us News     Speaker Microphone Transducer Buzzer Plate Receiver                      XZ-20B-70S Product Number XZ-20B-70S Description Enquiry Send Enquiry Specification Resonant Frequency (KHz) 7.0 ± 0.7 Resonant Impedance (Ω)max 250 Static Capacitance(pF)±30% 15000 Shape EKL Dimensions(mm) (D±0.1, d±0.2, T±0.05, t±0.02) 20 , 15 , 0.5 , 0.25 Plate Material Brass   Speaker Condenser Microphone Buzzer & Transducer Buzzer Plate Receiver Copyright 2004 by Union Team Limited (Group)