(1) Power Input: DC 5V 0.4A(2) Frequency Response: 20-20KHZ(3) Plug: USB(4) Speaker: Φ40mm*32Ω*19μ(5) Speaker Sensitivity: 117dB±3dB(6) Mic Size: 6*2.7mm(7) Mic Sensitivity: -42dB±2dB(8) Mic Directivity: Omnidirectional(9) Mic Impedance:≤2.2KΩ(10) Mic Frequency Response: 50HZ-15KHZ(11) Cable Length: 2.7M