1. It is used wireless digital and signal frequence for transmission, it can impove the signal more security and steady.
2.Place: effective using distance above 50 meters, best sound.
3. It is without any disrupt and jam, it is effective to stop the noise and jam when it is working.
3.Receiver is smart and easy to carry. 6 hours stand by time.
4.Great compatibility ability : used for all of the brand speaker, amplifier, karaoke speaker, mixer, teaching, tourism, speech, outdoor activity, etc.