A communications system includes wireless microphones including a controller, a codec, a communications module, and an antenna; a wireless transceiver including a controller for setting an operating frequency and an ID thereof and an operating frequency and an ID of each microphone, a codec, a communications module, and an antenna; and a PC including a communications module and an antenna. In one operation performed between the transceiver and the microphone in which in the transceiver data is encoded with an ID, the encoded data is sent to the communications module, the communications module sends the data to the antenna, and the antenna sends radio waves containing the data, and in the microphone the antenna receives and sends the data to the communications module, the communications module sends the data to the codec for decoding, and the decoded data is sent to the controller for verification.