"Speaker diameter: 50mm
Impedance: 20ohm±15%
Sensitivity: 117+/-3dB
Frequency: 20-20000Hz
Mic dimension: 6.0 * 2.7mm
Mic sensitivity: -38dB +/- 3dB
Mic impedance: 2.2kohm
Directivity: Omni-directional
Working current: Below 100mA
Headset interface: 1 X3.5mm Jack +2X3.5mm Jack