Product ID KWG2036R1 Impedance 150 © ± 15% at 1Vrms/ 1.5KHz Rated Power 0.1W Max Power 0.2W Resonant Frequency / Frequency Range 200Hz-3.5KHz Sound Pressure Level 103dB± 3 at 1KHz/ 100mv Diameter Ø 20mm Height 3.6mm Weight 2.6gram