Product details of AVF HM548 Full CVR Headset With Mic

• Microphone Dimension/ Sensitivity: 6x2.8mm/ -38±3dB
• Directivity: Omnidirectional
• Speaker Diameter/ Sensitivity: 40mm/ 96±3dB
• Impedance: 32 ohm
• Rated Output Power: 10mW
• Max Output Power: 40mW
• T.H.D: