It’s always difficult for the customer to set up the multiple wireless microphone system without interference. The more frequencies used, more interference occurred. Firstly, do not put the receiver too near metal object and avoid obstructions between transmitter and receiver for better reception ability. The MASCOT wireless microphone system with auto-scan function can automatically searching the non-interference frequencies, or with pre-set program can allowed the 8 microphone using simultaneously in each frequency range group.