The B-3 PLUS MIC BUNDLE uses our newest 2.4GHz wireless algorithm with NUX NDM-3 dynamic microphone. Plug the Transmitter (TX) to your mic, Receiver (RX) to PA system, and you are good to go. The B-3 Plus auto pairs with 6 channels scanning and can avoid Wi-Fi interference making it simple to use! Plug it in, turn it on, B-3 PLUS MIC BUNDLE makes it easy to everyone to embrace great wireless microphone sound.