100% Brand New.Microphone sensitivity: -72dBDirectivity: UndirectionalFrequency response: 100 to 10，000HzOut put impedance: 600ohmOperating voltage: DC 1.5VWorking distance: 15 to 30mEasy operation:Wired:Make sure the battery is not in the Microphone. And plug the cord to the microphone and your audio amplifier.Switch microphone to MIC position， and start to sing.Wireless:Install batteries into both microphone and receiver. Switch on them， the connection will be built easily. With LED indicator.Switch microphone to ON position， and start to sing.Switch microphone to MIC position when you need a short break. It won't collect other voices to the microphone.If it does not work normal. Use a screw to press the RESET hole on the receiver.If there are two wireless microphone working together. Please adjust one to red light， another one to green light.If you don't use it for long time. Please take batteries out to protect the microphone's components.This microphone combined both wired and wireless functions. Wireless let you singing free of dragging cord. Wired let you singing without the concern of battery power off. You can use this for speeches， lectures， meetings， karaoke， music performances or anything else.Note: Due to the difference between different monitors， the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. Thank you!Package Content:1 x Microphone1 x Microphone Wireless Receiver1 x Microphone Wireless Transmitter1 x Microphone Cord