Insert the microphone plug in the microphone "MIC" socket Take the microphone switch to the "ON" position and adjust the mic volume on the equipment. Take the switch to the "OFF" position when the microphone not use. Notes: Keep far away between the microphone and loudspeaker. Don't strike the microphone, avoid damaging the parts of the microphone. Don't put the microphone in a high temperature and moisture place. Take the microphone to the best distance(5-10cm DIRECT to mouth) so that to avoid noise. Please speak directly to the top of the microphone to pick up the clearest and loud sound.