Speaker diameter : 50mm
Impedance : 32dhm
Sensitivity : 100db +/- 3db
Frequency : 20-20000Hz
Microphone size : 6 x 2.7mm
Microphone sensitivity : -38db-b +/- 3db
Microphone impedance : 2.2 kohm
Directivity : Omnidirectional
Headphone interface : USB + 3.5mm
Working current : less than or equal to 100mA
Working voltage : DC 5V
Cable length : about 2.2m