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Wireless Microphones, UHF Rechargeable Cordless Karaoke Mics with Box Receiver,
Turn on the first set of receiver & mics. Pair the mics & receiver, and keep them on. Auto-Scan and IR Pairing: Automatically seeks out the most stable and interference-free frequencies; IR pairing process is fast and easy; each mic includes 100 UHF frequencies (538.1 to 597.8MHz).
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