LOUDSPEAKER, FULL RANGE, 2.5", Frequency Response Max:20kHz, Frequency Response Min:130Hz, Impedance:4ohm, Power Rating RMS:5W, Resonant Frequency:220Hz, Sensitivity (dB):-, Transducer Function:Speaker, Cone Size:2.5" (63.5mm), External Depth:29mm, External Length / Height:61mm, External Width:61mm, Height:61mm, Outer Diameter:74mm, Power Max:10W, Sound Level SPL:86dB, Weight:92g