| Speaker diameter: 50mm Impedance: 32ohm±15% Sensitivity: 106dB±3dB Frequency: 20-20000Hz Mic dimension: 6.0 * 2.7mm Mic sensitivity: -42dB ± 3dB Mic impedance: 2.2kohm Directivity: Omni-directional LED working voltage: DC5V ±5% Working current: Below 100mA Cable length：2.2M±15% Headset interface: USB +1 X3.5mm Jack |