Specification: Product Model: X3 Speaker Size: 40mm Sensitivity: 100+/-3db Impedance: 20Ω +/-15% Cable length: 2.2M +/- 0.15 Microphone: 6.0x 5.0mm Microphone impedance: 2.2kohm Frequency Range: 20Hz-20KHz Microphone Sensitivity: -42+/-3dB Working Current: ≤200mA Headset Jack: USB+3.5mm 4Pin Directionality: omnidirectional LED working voltage: DC5V +/- 5%