... Wide frequency response range;♥Shock-free holdset and switch Microphone,ensure the stable and safe of amplifier system ... radius in hard enviroment;♥Double channel design,support two wireless microphone in the same time ;♥Adopting frequency synthetic technology,allow ... switch,wider application range;♥Suitable for middle and big stage,karaoke room,home entertainment etc. Specification•Fequency range: ...