Specifications: *Plug Type: USB *Speaker Diameter: φ50MM *Sensitivity: 120±3dB S.P.L. at 1KHz *Frequency Response: 20~20000 Hz *Rated Power: 20 mW *Power Capability: 30 mW *Impedance: 32Ω±15% *Mic Dimensions: Φ6 * 2.7mm *Sensitivity: -38±2dB(0dB=1V/PA) *Impedance: ≤ 2.2K Ω(Max) *Rated Voltage: 5V