Features: Using UHF 500-980MHz band to avert interfering frequency. Using multilevel high frequency and mid frequency narrowband filter, so as to dispel any possible interfering signals. There is a volt indicating circuit in the microphone. It can tell you if it is necessary to change batteries. With audio compressing-expanding technology, the machine can lower noises and increase the dynamic range. It can also lower reecho. The receiver use multilevel high frequency enlarger, so it has high sensitivity. It has channel separate outputting and mix outputting, and it can be connected with the sound-adjusting stage and karaoke enlarger. Special tone key locked identity functions to avoid interfering signal from outside open the mute system. There are multilevel noise detect circuit, so it has strong antijam ability. Choose excellent chipset and high quality component, so that its timbre will be very good. Longest distance in open is up to 60 meters. Frequency response tailored for vocals, with brightened midrange and bass roll off. Uniform cardioid pickup pattern isolated the main sound source and minimizes background noise. Pneumatic shock-mount system cuts down handling noise. Effective, built-in spherical wind and pop filter. It can be used in small and large stages, ballrooms, auditoria, classrooms and families, suitable for many situations,such as Karaoke, performance, presentation and public address.