Home Company Profile Factory Profile Our Products Contact Us News     Speaker Microphone Transducer Buzzer Plate Receiver                      G-4028 Product Number G-4028 Description Enquiry Send Enquiry Specification Dimensions( Dia (mm) ) 40x28 Input Normal (W) 2.0 Input Max (W) 3.0 IMP (Ω) 8 Fo (Hz) 250 SPL (dB) 85 Frequency Range (Fo~Hz) Fo-20k MGNT Size (mm) ø18.5x3 Diaphragm PU   Speaker Condenser Microphone Buzzer & Transducer Buzzer Plate Receiver Copyright 2004 by Union Team Limited (Group)