Type WS-S3016 Uint Rated Impedance 16?5% ohm Rated (Max) Power 0.2(0.3) W Resonant Frequency 500?0% Hz Frequency Range Fo～5500 Hz Sound Pressure Level 80? By LMS4.0 at 0.25w 0.5m dB operating Temp -10℃～+40 ℃ Size DxH 29*5.0 mm Cone Material Transparent Mylar Frame Material Metal