The NUX B-3RC, 2.4GHz microphone system, frees you from the annoying cables, and enjoy the wireless world with non-complicated functions and setups. The more compact size brings better using experience. An extra dynamic microphone and charging storage box are packed into the bundle set. B-3RC has auto pairing and channel group selection. Plug the Transmitter (TX) to your mic, Receiver (RX) to PA system, and you are good to go. The units will automatically detect each other and choose the best channel from all 6 channels. Delivering detailed consideration for performers' control need, B-3RC allows to swiftly mute from Transmitter (TX)'s power switch button.