Brand: Havit Model: H659d Speaker Size: Φ50MM Sensitivity: 118±3DB Frequency Range: 20Hz-20KHz Sensitivity: 108dB±3dB Microphone: Φ6*2.7mm Microphone Sensitivity: -38+/-3dB Cable Length: 2.2 M Connectors Type: USB+3.5mm Jack 3.5mm X 1 + USB (2 X 3.5mm)