Home Company Profile Factory Profile Our Products Contact Us News     Speaker Microphone Transducer Buzzer Plate Receiver                      NB201C-04 Product Number NB201C-04 Description Enquiry Send Enquiry Specification Size (mm) 57x57 Rated Impedance (Ω) 4~32(±15%) Rated Power (W) 0.25 Max Power (W) 0.5 Resonant Frequency (Hz) 550 ± 20% Frequency Range (Hz) fo-5500 Sound Pressure Level (dB) 87±3 Magnet Size (mm) ø 13x10   Speaker Condenser Microphone Buzzer & Transducer Buzzer Plate Receiver Copyright 2004 by Union Team Limited (Group)