... 1.ISO,CE,FCC 2.wireless,bluetooth digital amp 3.teaching,conference 4.power:2*150W-300W,DC 6V Multimedia Wireless Amplifier(WY-2000 ... :1. It was built-in 2.4G wireless digital receiver and has more than 1000 receiver channels.2. The transmitter could connect with ... independent MIC VOL control,five line wired MIC input,a 2.4G wireless MIC input,three line audio input.11. The system ...