A.FM wireless microphone: commonly known as FM refers to FM 88- 108MHz international FM broadcasting frequency band. Early consumer wireless microphones were received by FM radios. The system is simple and low cost. However, due to the use effect, it can not meet the requirements of professional quality, and can only become a toy for children or students in the 2/kloc-0 century.

B.VHF wireless microphone: divided into low frequency and high frequency. The former uses the frequency band of 50 MHz VHF. Because of its low frequency and long antenna length, it is most vulnerable to interference from various electrical clutter. This kind of products were replaced by high-frequency bands in 2 1 century and gradually disappeared from the market. The latter uses VHF200MHz frequency band. Because of its high frequency and short antenna, it can even be designed as a hidden antenna, which is convenient, safe and beautiful, greatly reducing the clutter interference of electrical appliances, extremely mature circuit design and low parts price, so it has become a popular model in today's market.

C.UHF wireless microphone: a wireless microphone with a frequency of 300-3000M is used. It is the mainstream of microphone application in 2 1 century. Because the interference of V-section interphone is avoided, the stability is greatly improved.