High quality， Fast delivery， We aims to provide excellent quality products and customer service.Specification :Loudhailer diameter: 40mmCable length :about 2.2m Frequency range :20-20KHzSensitivity : 98¡À3 dB at 1KHzImpedance :32 Ohm at 1KHzInput power :30 mw maxMic dimension:6¡Á5 mmMic sensitivity :-54¡À3dBPlug :3.5mmColor :blue+whitePackage included:1 pc wire headsetPlease don't be hesitate to contact us if you have any question.Thank you