This mobile phone microphone set has a 13.5mm dynamic speaker that has 32 omega impedance. The sensitivity of this headset is 100 dB, which ensures quality sound output. 2.5mm stereo plug is compatibility with mobile phone device for convenience of access.

• Driver unit: 13.5mm dynamic speaker.
• Impedance: 32 omega.
• Sensitivity: 100 dB.
• Freq. response: 20-10k Hz.
• Mic element: ECM.
• Mic sensitivity: -63 dB
• Mic freq. response: 40-16k Hz.
• Plug: diameter 2.5mm stereo plug.