Home Company Profile Factory Profile Our Products Contact Us News     Speaker Microphone Transducer Buzzer Plate Receiver                      M57H12.58DRJ21 Product Number M57H12.58DRJ21 Description Enquiry Send Enquiry Specification Rated Impedance (Ω±15%) 8 Rated Power (W) 0.25 Max Power (W) 0.5 Resonant Frequency (Hz±20%) 350 Frequency Range Fo (Hz) 5000 Sound Pressure Level (±3dB) 90 Operating Temperature (℃) -20 ~ +55 Magnet Size (mm) 21x5 Size (mm) Dia 57 Size (mm) Height 12.5   Speaker Condenser Microphone Buzzer & Transducer Buzzer Plate Receiver Copyright 2004 by Union Team Limited (Group)