Dimension: Phi;20*4.0;
Rated Impedance: 150±15%OΩ;
Rated Power: 30mW;
Max Power: 50mW;
Frequency Range: 300HZ ~ 3400Hz;
Sound Pressure Level: 92±3dB;
MF.Intensity axial: ≥-21dB(1KHz.  0dB=1A/M);
MF.Intensity radial: ≥-23 dB(1KHz.  0dB=1A/M);
Mount: wire leads, connector.