Unit Driver:ф9mm;
Impedance:16±15%ohm;
Sensitivity:101±3dB(at 1K Hz);
Frequency Range:20Hz-20KHz;
Rated Power:3mW;                
Maximum power:5mW; 
THD.: ≦5% 
Input Connection: 3.5mm plug plating Gold ;
Cord Length: 1.2±10%m