Cosonic USB-M.S680 Headphones
Driver Unit: 30mm,
Speaker Impedance: 64ohm±15%,
Speaker Sensitivity: 105dB±3dB,
Speaker Frequency Response: 20-20,000Hz,
Maximum Power Input: 100mw,
Microphone Operating Voltage: 4.5V,
Microphone impedance: 2200 Ohm,
Wire length 1.9 metres