The microphone adopts UHF frequency band(Use lawful signal bands with US FCC ID), Open Place: UHF distance240FT/75m, Bluetooth 32ft/10m, low delay and crystal clear sound quality.●Adjustable 15 Frequency Channel, If you use multiple microphones at the same time or noise, Click the switch at the end of the microphone to adjust the channel.(Each microphone channel number is inconsistent to avoid interference).
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