Adjustable Frequencies Each karaoke microphone has 15 UHF adjustable channels avoiding radio interference. Up to 30 microphones can be used simultaneously. The multichannel feature ensures seamless frequency switching for reliable performance.Wide Transmission Range Our wireless microphones have a transmission range of up to 200 feet 60 meters with distortionfree sound. They provide a stable signal no delay no radiation and antihowling and antijamming features.Support Multiple DevicesComing with a 6.35mm audio cable our microphone for singing is compatible with devices like amplifiers karaoke machines and powered speakers. Please plug the microphone into the MIC IN input on your speaker to ensure sound output.Easy to Use Our wireless mic and receiver automatically pair when turned on. There is a separate volume control VOL.A VOL.B for each wireless microphone. This makes it ideal for various occasions such as home karaoke stage performances weddings and more.Superb Sound Quality The cardioid capsule delivers warm smooth sound with excellent feedback rejection. With a sensitivity of 52dB3dB and S/N Ratio 96dB it maximizes gain before feedback making your voice effortlessly stand out. It also minimizes handling noise ensuring brilliant sound quality.